The general error of the dma controller is correct. Error codes and BIOS processes. Messages about fatal errors.

Description:

I bring to your attention the main POST codes forBIOS manufacturerAMI. A small introduction. Immediately after you press the POWER button on the the system unit personal computer control PC goes directly to the BIOS. At this time (at the start of the PC startup), the processor signals to the BIOS chip, which initializes the BOOT-ROUTINE firmware download Basic System Input-Output.
The BOOT-ROUTINE firmware invokes the POST self-test routine.

Therefore - notice! - If you do not like our advice, you have a professional service. Check the manual or contact the seller for installation instructions. Make sure that on your motherboard all the necessary power connectors are connected.

Disconnect and reconnect the video card connector. If you do not have a connector, ask your motherboard or computer vendor for help. If not, your graphics card is not installed correctly. Make sure that all the reasons mentioned in this article have been eliminated.

Contact the manufacturer for the latest. Verify that the operating system recognizes the installed video adapters. It should show the presence of two video cards correctly, without pointing out any errors or conflicts. Contact your dealer for a new one.

Subprogramme POST (Power-On Self Test) tests the equipment installed on the computer, sets it up and prepares it for operation.

For each individual equipment (processor, memory, video card, keyboard, I / O ports, etc.) a separate test is performed. Each test has its own unique number, which is called the POST code. POST code is written to the port Manufacturing Test Port (with address 0080H) before the start of each individual POST test.

Set your cards separately to make sure they both work. This type of problem is probably the worst kind of computer failure that can happen to us. When the computer can not work, we do not have access to the system, disk, data. In addition, it is usually difficult to solve such a problem. Often the cause is physical damage to any component. However, there is no way out.

First of all, try the tips in this chapter - they contain solutions to the most common problems with starting the system. It is always useful to look for solutions on the Internet, even if you are using a smartphone and enter in search engine the content of the error message. And, finally, if we can not load the system, we can remove hDD and try to access it using another computer. Then, at least, we will restore the data.

After the test POST code is written to the Port of Manufacturing Test Port, the testing procedure for the relevant equipment begins. If the testing procedure fails with the Manufacturing Test Port, the POST code of the last procedure remains (which caused the error). If you find out the POST code of the last procedure, you can determine the device that caused the error.

Decision. This message concerns the cooling of the processor, that is, the fan. To test this, you need to open the case and start the computer. If after starting the computer with the open case we see that the fan does not rotate, this can mean two things: a fan failure or a power outlet on the motherboard.

Fan or socket failure

To check if there is a problem with the fan or socket, connect the fan, for example, to the housing socket. The output has the same voltage as it is safe. If the fan does not work, we need to replace it. If it works, it can be plugged into the chassis connector, but we need to monitor the CPU temperature to ensure it is properly cooled. We can use the program that we find on the CD-ROM that accompanies the book.

Reading POST-codes can be done in several ways.

If your motherboard has a built-in indicator POST-codes, information about the POST-code of the last procedure can be learned from it.
The POST code of the last procedure performed on some systems can be displayed on the monitor screen during the POST procedure.
A special expansion card can be used to read the POST codes.

Since the BIOS is issued by several manufacturers, respectively, for each BIOS of a separate manufacturer there is a table of POST-codes.

Here you will find information about CPU temperature and fan activity. If the fan speed is high and the temperature is low, we do not need to worry. But if the speed is low and the temperature is high, you need to buy a new fan. The standard fans, which are part of the processors, are small and have very high speeds for good performance. New solutions allow you to cool the processor passively or with large fans at a much slower rate. If we are sure that the fan is working and the CPU temperature is low, we do not need to worry.

This table contains POST-codes, which are displayed in full POST.

CF Determines the type of processor and tests read / write CMOS
C0 The chipset and L1-, L2-cache are pre-initialized, interrupt controller, DMA, timer is programmed
C1 Type and volume are detected random access memory
C3 The BIOS code is unpacked into the temporary memory area
0C Checksum checks BIOS
C5 The BIOS code is copied to the shadow memory and control is passed to the Boot Block
01 The XGROUP module is unpacked at the physical address 1000: 0000h
02 Initialize the processor. The CR and MSR registers are set
03 I / O resources are defined (Super I / O)
05 Clears the CMOS screen and status flag
06 The coprocessor is checked
07 The keyboard controller is detected and tested
08 Defines the keyboard interface
09 Initializing the Serial ATA Controller
OA Defines the keyboard and mouse that are connected to the PS / 2 ports
0B AC97 audio controller resources are installed
OE Memory segment F000h is tested
10 Determines the type of flash memory
12 CMOS is tested
14 The values for the chipset registers are set
16 The clock generator is initialized
18 Determines the type of processor, its parameters and cache volumes L1 and L2
1B Interrupt Vector Table Initialized
1C Checksums of CMOS and battery voltage
1D Power Management Power Management System is defined
1F Matrix keyboard is loaded (for laptops)
21 Hardware Power Management (for laptops) is initialized
23 The mathematical coprocessor, the drive, the initialization of the chipset
24 The microcode of the processor is updated. A Plug and Play device resource map is created
25 Initial initialization of PCI: devices are listed, VGA adapter is searched, VGA BIOS entry is written to address C000: 0
26 The clock frequency of the CMOS Setup is set. Synchronization of unused DIMM and PCI slots is disabled. The monitoring system (H / W Monitor) is initialized
27 INT 09h interrupt is enabled. The keyboard controller is initialized again
29 MTRR registers are programmed, and APIC is initialized. The IDE controller is programmed. The frequency of the processor is measured. The BIOS extension of the video system is called
2B BIOS BIOS Search
2D Displays the Award Award, information about the type of processor and its speed
33 The keyboard is reset
35 The first DMA channel is tested
37 The second DMA channel is tested
39 The DMA page registers are tested
3C The controller 8254 (timer)
3E Interrupt controller check 8259
43 The interrupt controller is checked
47 ISA / EISA buses are tested
49 The amount of RAM is calculated. Configurable registers for the AMD K5 processor
4E MTRR registers for Syrix processors are programmed. L2 and APIC cache are initialized
50 Determines the USB bus
52 RAM is tested with results displayed. Cleared Extended Memory
53 If the CMOS is cleared, the password for logging on is reset
55 The number of processors (for multiprocessor platforms)
57 The EPA logo is displayed. Initial initialization of ISA PnP devices
59 The virus protection system is defined
5B Prompt to start BIOS update from a floppy disk
5D Super I / O controller starts up and integrated audio controller
60 Entering CMOS Setup if the Delete key was pressed
65 The PS / 2 mouse is initialized
69 L2 cache is enabled
6B Chipset registers are configured according to BIOS Setup
6D Assign resources for ISA PnP devices and COM ports for integrated devices
6F The floppy disk controller is initialized and configured
75 IDE devices are detected and installed: hard disks, CD / DVD, LS-120, ZIP and others.
76 Displays information about detected IDE devices
77 Serial and Parallel Ports Initialized
7A A math coprocessor is reset and ready for use
7C Defines protection against unauthorized recording on hard disks
7F If there are errors, a message is displayed and the Delete keys and F1
82 The memory for power management is allocated and changes are made to the ESCD table.
Clears the screen saver with the EPA logo. A password is requested if needed
83 All data is stored from the time stack in CMOS
84 Displaying the Initializing Plug and Play Cards
85 USB initialization is complete
87 SYSID tables are created in the DMI area
89 The ACPI tables are installed. Interrupts for PCI devices are assigned
8B Called the BIOS of additional ISA or PCI controllers, except for the video adapter
8D Parameters of RAM parity by CMOS Setup are set. Initializing APM
8F IRQ 12 is enabled for hot-plugging the PS / 2 mouse
94 Completing the initialization of the chipset. Displays the resource allocation table. Enable L2 cache. Setting the mode of transition to summer / winter time
95 The keyboard auto-repeat frequency and the Num Lock state are set
96 For multiprocessor systems, registers (for Cyrix processors) are configured. The ESCD table is created. The DOS Time timer is set according to the RTC CMOS clock. Sections are saved. boot devices for use by the built-in antivirus. The speaker announces the end of POST. The MSIRQ FF table is created. The BIOS interrupt is INT 19h. Search for the bootloader in the first sector of the boot device

A shortened procedure is performed when the Quick Power On Self Test parameter is set in the BIOS.

A message appears, but nothing threatens the computer. Removing faulty equipment should help. To verify this, you must turn off the devices until the problem disappears with the trial and error procedure. Let's keep in mind a few basic steps.

If you want to remove anything from inside your computer, be sure to turn off the power and discharge static electricity by touching the metal, such as a heater. The equipment we suspect to cause a problem is worth checking out by connecting to another computer.

We restart the computer every time.
If we do not, we risk damaging the electronics.

This error can be generated for several reasons, so you need to determine the cause.

65 The video adapter is reset. The sound controller, input / output devices are initialized, the keyboard and mouse are tested. Verifies the integrity of the BIOS
66 The cache is initialized. A table of interrupt vectors is created. The power management system is initialized
67 The CMOS checksum is checked and the battery is tested. Configures the chipset based on CMOS parameters
68 The video adapter is initialized
69 Configures the interrupt controller
6A RAM is tested (accelerated)
6B The EPA logo is displayed, the results of the CPU and memory tests
70 A prompt for entering BIOS Setup is displayed. The mouse is connected to the PS / 2 or USB
71 Cache controller initialized
72 Chipset registers are configured. A list of Plug and Play devices is created. & The drive controller is initialized
73 The controller is initialized hard disks
74 The coprocessor is initialized
75 If necessary, the hard disk is write protected
77 If necessary, a password is requested and Press F1 to continue, DEL to enter Setup
78 The expansion cards with their own BIOS are initialized
79 Platform resources are initialized
7A The root table RSDT, DSDT device table, FADT, etc. are generated.
7D Information about bootable device partitions
7E BIOS getting ready to load operating system
7F The status of the NumLock indicator is set according to the settings
BIOS Setup
80 Invoked INT 19 and the operating system is started

AMIBIOS8.0

Here are the common causes of errors with an error during overclocking. If we tried to configure a particular component, for example a processor, we could over-voltage or other settings, and the computer returned an error. The computer has a power problem - the power supply may not deliver the correct voltage in all the lines. The standard voltages are 3, 3 V, 5 V and 12 V - the permissible error margin, however, if the values are significantly different, this may indicate a poor state of the power supply. Trying to overclock - overclock the computer. . Attention!

D0 Initialize the processor and chipset. Checksum of the BIOS boot block
D1 Initialization of the I / O ports. The keyboard controller is sent a command for the BAT self-test
D2 Disable the L1 / L2 cache. The amount of installed RAM is determined
D3 Memory regeneration schemes are configured. Cache memory is allowed
D4 Test of 512 KB of memory. The stack is set and the protocol of exchange with the cache memory is assigned
D5 The BIOS code is unpacked and copied to the shadow storage
D6 Checksum BIOS checks and keystrokes Ctrl + Home (BIOS recovery)
D7 Control is transferred to the interface module that unpacks the code into the Run-Time area
D8 The executable code is unpacked from flash to operative. CPUID information is stored
D9 The unpacked code is transferred from the temporary storage area to segments 0E000h and 0F000h of RAM
DA The CPUID registers are restored. POST execution is transferred to RAM
E1-E8, EC-EE Errors associated with the configuration of the system memory
03 It is forbidden to process NMI, parity errors, output signals to the monitor. The area reserved for the GPNV event log is reserved, the initial values of variables from the BIOS are set
04 The battery is operational and the CMOS checksum is counted
05 The interrupt controller is initialized and a table of vectors is constructed
06 The timer is being tested and ready for use
08 The keyboard is being tested (the keypad indicators are flashing)
C0 Initialization of the processor. It is forbidden to use cache memory. Defined by APIC
C1 For multiprocessor systems, the processor responsible for starting the system
C2 The processor assignment for starting the system is complete. Identification with CPUID
C5 Determines the number of processors, their parameters are configured
C6 Initializes the cache for faster POST
C7 Initial processor initialization is complete
0A Defines the keyboard controller
0B Search for a mouse connected to the PS / 2 port
0C The presence of the keyboard is checked
0E Various input devices are detected and initialized
13 Initial Initialization of Chipset Registers
24 Platform specific BIOS modules are unpacked and initialized.
A table of interrupt vectors is created and interrupt processing is initialized
2A The DIM mechanism detects devices on local buses. Prepares to initialize the video adapter, builds a resource allocation table
2C Detection and initialization of the video adapter, the video adapter is called by the BIOS
2E Searching and initializing additional input / output devices
30 Preparing to process SMI
31 The ADM module is initialized and activated
33 The simplified boot module is initialized
37 AMI logo displayed, BIOS version, CPU, BIOS key prompt for BIOS input
38 DIM initializes various devices on local buses
39 DMA controller initialized
3A The system time is set according to the RTC clock
3B RAM is tested and the results are displayed.
3C Chipset registers are configured
40 Serial and parallel ports, a mathematical coprocessor, etc. are initialized.
52 Memory test results update RAM data in CMOS
60 The BIOS Setup is set to the NumLock state and the auto-repeat settings are configured
75 The procedure for working with disk devices is started (interrupt INT 13h)
78 A list of IPL devices is created (from which the operating system can be booted)
7C Create and save in NVRAM tables of the extended system configuration ESCD
84 Logging errors detected during POST
85 Messages about detected non-critical errors are displayed.
87 If necessary, run the BIOS Setup, which is previously unpacked in RAM
8C In accordance with the BIOS Setup, chipset registers are configured
8D Builds the ACPI tables
8E Configures non-maskable interrupts (NMI)
90 SMI is finally initialized
A1 Clearing data that is not needed when the operating system boots
A2 EFI modules are prepared for interaction with the operating system
A4 In accordance with the BIOS Setup language module is initialized
A7 The summary table of the POST procedure is displayed
A8 The state of the MTRR registers is set
A9 If necessary, wait for keyboard commands to be input
AA POST interrupt vectors (INT 1Ch and INT 09h) are deleted
AB Devices for loading the operating system are defined
AC The final steps of the chipset configuration in accordance with the BIOS Setup
B1 Configures the ACPI interface
00 Interrupt handling INT 19h is called (boot sector search, OS load)

PhoenixBios 4.0

Be careful when turning on the computer, as this leads to a significant increase in heat dissipation, which can lead to component overheating and faster wear. Problem. When you start your computer, you receive a "Boot Device Error" error message.

This error can be the result, for example, of a sudden power outage. You need to restore correct settings. All of our disks are correctly recognized by the computer. We need to change the setting from "Disabled" to "Enabled", save the settings and restart the computer.

02 Verify Real Mode
03 Disable Non-Maskable Interrupt (NMI)
04 Get CPU type
06 Initialize system hardware
08 Initialize chipset with initial POST values
09 Set IN POST flag
0A Initialize CPU registers
0B Enable CPU cache
0C Initialize caches to initial POST values
0E Initialize I / O component
0F Initialize the local bus IDE
10 Initialize Power Management
11 Load alternate registers with initial POST values
12 Restore CPU control word during warm boot
13 Initialize PCI Bus Mastering devices
14 Initialize keyboard controller
16 (1-2-2-3) BIOS ROM checksum
17 Initialize cache before memory autosize
18 8254 timer initialization
1A 8237 DMA controller initialization
1C Reset Programmable Interrupt Controller
20 (1-3-1-1) Test DRAM refresh
22 (1-3-1-3) Test 8742 Keyboard Controller
24 Set ES segment register to 4 GB
26 Enable A20 line
28 Autosize DRAM
29 Initialize POST Memory Manager
2A Clear 512 KB base RAM
2C (1-3-4-1) RAM failure on address line xxxx
2E (1-3-4-3) RAM failure on data bits xxxx of low byte of memory bus
2F Enable cache before system BIOS shadow
30 (1-4-1-1) RAM failure on data bits xxxx of high byte of memory bus
32 Test CPU bus-clock frequency
33 Initialize Phoenix Dispatch Manager
34 Disable Power Button during POST
35 Re-initialize registers
36 Warm start shut down
37 Re-initialize chipset
38 Shadow system BIOS ROM
39 Re-initialize cache
3A Autosize cache
3C Advanced configuration of chipset registers
3D Load alternate registers with CMOS values
40 CPU speed detection
42 Initialize interrupt vectors
45 POST device initialization
46 (2-1-2-3) Check ROM copyright notice
48 Check video configuration against CMOS
49 Initialize PCI bus and devices
4A Initialize all video adapters in system
4B QuietBoot start (optional)
4C Shadow video BIOS ROM
4E Display BIOS copyright notice
50 Display CPU type and speed
51 Initialize EISA board
52 Test keyboard The keyboard is tested
54 Set key click if enabled
55 Initialize USB bus
58 (2-2-3-1) Test for unexpected interrupts
59 Initialize POST display service
5A Display prompt "Press F2 to enter SETUP"
5B Disable CPU cache
5C Test RAM between 512 and 640 KB
60 Test extended memory
62 Test extended memory address lines
64 Jump to UserPatch1
66 Configure advanced cache registers
67 Initialize Multi Processor APIC
68 Enable external and CPU caches
69 Setup System Management Mode (SMM) area
6A Display external L2 cache size
6B Load custom defaults (optional)
6C Display shadow-area message
6E Display possible high address for UMB recovery
70 Display error messages Displays error messages
72 Check for configuration errors
76 Check for keyboard errors
7C Set up hardware interrupt vectors
7D Initialize hardware monitoring
7E Initialize coprocessor if present
80 Disable onboard Super I / O ports and IRQs
81 Late POST device initialization
82 Detect and install external RS232 ports
83 Configure non-MCD IDE controllers
84 Detect and install external parallel ports
85 Initialize PC-compatible PnP ISA devices
86 Re-initialize onboard I / O ports
87 Configure Motheboard Configurable Devices (optional)
88 Initialize BIOS Data Area
89 Enable Non-Maskable Interrupts (NMIs)
8A Initialize Extended BIOS Data Area
8B Test and initialize PS / 2 mouse
8C Initialize floppy controller
8F Determine the number of ATA drives (optional)
90 Initialize hard-disk controllers
91 Initialize local-bus harddisk controllers
92 Jump to UserPatch2
93 Build MPTABLE for multi-processor boards
95 Install CD ROM for boot
96 Clear huge ES segment register
97 Fixup Multi Processor table
98 (1-2) Search for option ROMs. One long, two short beeps on checksum failure
99 Check for SMART Drive (optional)
9A Shadow option ROMs
9C Set up Power Management
9D Initialize security engine (optional)
9E Enable hardware interrupts
9F Determine number of ATA and SCSI drives
A0 Set time of day
A2 Check key lock
A4 Initialize Typematic rate
A8 Erase F2 prompt
AA Scan for F2 key stroke
AC Enter SETUP
AE Clear Boot flag
B0 Check for errors
B2 POST done - prepare to boot operating system
B4 (1) One short beep before boot
B5 Terminate QuietBoot (optional)
B6 Check password (optional)
B9 Prepare Boot
BA Initialize DMI parameters
BB Initialize PnP Option ROMs
BC Clear parity checkers
BD Display MultiBoot menu
BE Clear screen (optional)
BF Check virus and backup reminders
C0 Try to boot with INT 19
C1 Initialize POST Error Manager (PEM)
C2 Initialize error logging
C3 Initialize error display function
C4 Initialize system error handler
C5 PnPnd dual CMOS (optional)
C6 Initialize notebook docking (optional)
C7 Initialize notebook docking late
D2 Unknown interrupt
E0 Initialize the chipset
E1 Initialize the bridge
E2 Initialize the CPU
E3 Initialize system timer
E4 Initialize system I / O
E5 Check force recovery boot
E6 Checksum BIOS ROM
E7 Go to BIOS
E8 Set Huge Segment
E9 Initialize Multi Processor
EA Initialize OEM special code
EB Initialize PIC and DMA
EC Initialize Memory type
ED Initialize Memory size
EE Shadow Boot Block
EF System memory test
F0 Initialize interrupt vectors
F1 Initialize Real Time Clock
F2 Initialize video
F3 Initialize System Management Mode
F4 (1) Output one beep before boot
F5 Boot to Mini DOS
F6 Clear Huge Segment
F7 Boot to Full DOS

Original and reliable tables of POST-codes can be found on the corresponding sites of the BIOS manufacturers: "AMI" and "Award". Sometimes table POST-codes are given in the manuals to motherboards.
1. Test of program-accessible registers of the processor (POST-codes: 01, 02).
2. Check the regeneration period of the main memory (POST-code: 04).
3. Initialize the keyboard controller (POST code: 05).
4. Preliminary check of the working capacity of the nonvolatile memory (CMOS) and the status of the CMOS battery (POST-code: 07).
5. Initialization of the chipset's registers with the default values (POST-code: BE, hex).
6. Check for availability and determine the size of RAM (POST-code: C1, hex).
7. Determination of the presence and size of the external cache memory (POST-code: C6, hex).
8. Check the first 64 KB of RAM (POST-code: 08).
9. Initialization of interrupt vectors (POST-code: 0A, hex).
10. Checksum checksum CMOS (POST-code: 0V, hex).
11. Detection and initialization of the video controller (POST-code: 0D, hex).
12. Video memory test (POST-code: 0E, hex).
13. Checking the BIOS checksum (POST-code: 0F, hex).
14. Checking the controllers and registers of DMA pages (POST-codes: 10,
11, hex).
15. Checking the system timer (POST-code: 14, hex).
16. Verification and initialization of interrupt controllers (POST-codes: 15 ... 18, hex).
17. Initialization of expansion bus slots (POST codes: 20 ... 2F, hex).
18. Determining the size and checking the main and extended memory (POST-codes: 30, 31, hex).
19. Re-initialize the registers of the chipset set according to the values set in the CMOS Setup (POST-code: BF, hex).
20. Initializing the FDD controller (POST code: 41, hex).
21. HDD controller initialization (POST code: 42, hex).
22. Initialization of COM and LPT ports (POST code: 43, hex).
23. Detection and initialization of the mathematical coprocessor (POST-code: 45, hex).
24. Verify the need for a password (POST code: 4F, hex).
25. Initialization of BIOS extensions (POST-code: 52, hex).
26. Set the parameters of Virus Protect, Boot Speed, NumLock, Boot Attempt according to the values set in CMOS Setup (POST-codes: 60 ... 63, hex).
27. Calling the procedure for loading the operating system (POST-code: FF, hex).
As can be seen from the above sequence, the possibility of displaying diagnostic messages on the monitor screen appears only after the video controller has been initialized, and if the POST procedure stopped at one of the previous stages, it is impossible to see which one.

The computer sees the hard drive, but can not start the system

Insert the disk into the drive or connect the media and restart the computer. We confirm the information about the language, and on the next screen, click Restore Computer. Then click "Troubleshoot" and " Command line". If all commands return information about the correct operation, we can restart the computer. The system should run smoothly.

Additional tips can be found here. A hot download is done in a system that has already been turned on and does not repeat the first steps described below. When you press the power button, the source receives power and initializes. Delay occurs when the source begins to feed other components in the system. Pay attention to the sounds that you hear before the monitor appears. All is stopped until the system chipsets receive a signal that the source has been initialized, so the boot process may begin.

Optional download Cheats and diagnostic messages POST BIOS

BIOS Errors

message If not, a series of beeps will alert you to one or more problems. If you look at the keyboard, you will notice a keyboard scan. If this scan is not performed, the processor or motherboard does not work. If the scan happens and you do not have a signal on your monitor, the video card may be at fault. If found, the video adapter is initialized and the image appears on the monitor. If the problem is detected, an error message will be displayed on the monitor. Depending on the speed of the system, you need to quickly read the forces or press the "Pause" key. If not, it will look for the primary hard disk, namely the master boot record, to start the operating system boot. If a hard disk or disk is not found, an error message is displayed on the monitor. If you are using multiple operating systems, you will see a menu that allows you to select the operating system to start during this session.	Problem	decision
Cmos battery Has failed In the hope that the information will be useful, please fill in or correct the above. This works as soon as the computer is assembled. The development of these manufacturers is used on most computers, laptops and servers. After starting this system, it will start working and check other functions of the computer. If errors were detected during computer startup, the computer turns off and the information about the detected problem is displayed. Operating system loading. In addition, the user can install several startup units. These features are used when running operating systems or errors.	My battery is almost done	Replace the battery
Cmos Checksum Error Basic computer setup. Among the most important: lack of strict hardware limitations, enhanced interaction with the boot of the operating system, improved interface and support for loading the operating system on hard disks more than 2 terabytes. These software routines are executed immediately after the computer is turned on. Clock internal memory updated. Two short ones: parity memory error. If the problem persists, you need to change the memory or the motherboard. Do the same as above. Four shorts: an inner cessation. The battery on the motherboard needs to be replaced. Five short: CPU initialization failed. You need to replace the processor or motherboard. Six short: keyboard initialization error. Check the keyboard connection or change it. This can also be a problem with the keyboard controller.	Incorrect CMOS checksum. Data in CMOS is corrupted. The battery is dead, maybe.	Check the BIOS battery on the system board and replace it if necessary. Seven short: an error in the motherboard or processor circuits. Eight: it is not possible to initialize the memory of the graphics card - missing or not detected. Make sure the card is inserted correctly into the slot. If the problem persists, replace the card. Replace the cache or motherboard. One long and eight short: the graphics card can not be initialized. One long: all tests went well. The computer is approved in terms of hardware. One long and two short: a video card error. Check the connection of the monitor to the board and insert it correctly in the socket.
Disk Boot Failure, Hard disk (s) fail (80) Invalid Drive Specification	The boot disk was not found or damaged.	Boot from the floppy disk and check the hard drive. Option - check boot disk parameters in BIOS Audible alarm continuously: Memory error. Check the memory modules. One long and three short: the graphics card or its memory can not be initialized. Beep: the signal overheats. Check or replace the cooler on it. Repeated sound signals: CPU error. Interpretation of error codes and messages Although the cards are durable, the codes may become obsolete. However, since some systems use numeric error codes, and because even "simple English" codes require interpretation, these messages can still be a problem for interpretation. In systems with large brands, you will usually find a list of error codes and messages in the system documentation.
Error Encountered Initializing Hard Drive	The hard disk is not initialized.	Check the hard disk controller installation and the connection cables. Probably everyone heard a short tone that sounds when you turn on the desktop. This signal means that the computer is OK, and it is ready to work. Interpretation of error codes and messages Although the cards are durable, the codes may become obsolete. However, since some systems use numeric error codes, and because even "simple English" codes require interpretation, these messages can still be a problem for interpretation. In systems with large brands, you will usually find a list of error codes and messages in the system documentation.
Invalid System configuration Data	Wrong bIOS configuration	Logging in BIOS,adjust the settings manually or select an option. Reset Configuration DATA (Default Configuration)
Floppy Disk Error	I can not initialize the floppy drive	Check the drive settings specified in Setup
Keyboard Error Or No Keyboard Present	Can not initialize keyboard	Check the keyboard connection and its type. As a last resort, disable keyboard control at boot time.
Memory Address Error At XXXX	Memory error	Replace memory
Memory Parify Error At XXXX	Parity error	Replace memory
Memory Verify Error At XXXX	Error while testing memory	Replace memory
Press a Key To Reboot	The message occurs when errors are detected and the need to reboot	Press any button to reboot.
Ram Parity Error- Checking for Segment	Memory parity error	Replace memory
System halted, (Ctrl-Alt-Del) To Reboot ...	Indicates stopping the boot process	Click Ctrl-Alt -Del to reboot
Warning: The boot devices Have been changed. BBS boot priority will be continue, Del to enter Setup	The amount of hard disks detected by the system has changed. This can happen if before you booted you turned off (or connected) an external or internal hard drive)	Try it. As the computer advises, press the F 1 button to continue the download. It does not work out-you have to enter using the Del key in bIOS Setup and check whether they are correctly set up. It is better to instruct the specialist to do this.

Error at, where code is the error.

Error code Error cause

01The reason for the error can not be determined

02Problems in the power supply

1 Error on the motherboard

2Random memory error

3The keyboard error

4The error of a monochrome video card (MDA, Hercules)

5Chiba video card error

6 BIOS error during floppy drive operation

7 BIOS error while running the math coprocessor

9 BIOS error while parallel port LPT1 operation

10 BIOS error while parallel port LPT2 operation

11 BIOS error in COM1 serial port operation

12 BIOS error during COM2 serial port operation

13Error in the game port

14 Printer error

17 Error during operation hard drive

18 Error while operating any expansion card

30 Network Card Error

74 Error while running the video card

85 Memory error in EMS mode

Text messages on the monitor screen

8042 Gate-A20 Error! The keyboard controller line A20 (8042) does not work. Replace the keyboard controller.

Address Line Short! The problem with the decoding scheme of the memory address. It makes sense to reboot, waiting for 30 seconds before restarting. The problem can be solved by itself.

BIOS ROM checksum error - System halted The check sum at the test ROM at address F0000H-FFFFFH is erroneous. You may need to repair (flashing) the chip with Flash.

BIOS Update For Installed CPU Failed An error occurred while attempting to update the microcode of the CPU. This may be due to a mismatch between the BIOS version and the CPU model. The BIOS attempt to fix non-existent errors in the CPU architecture (for which the BIOS Update is intended) leads to a new error.

Bad PnP Serial ID Checksum An error in the checksum of the Plug and Play identification number. Check the installation of all expansion cards, if the message appears, you will most likely have to replace the device causing the error.

Boot Error - Press To Retry The system could not find any the boot disk. The cable may be defective.

Bus Time - Out NMI At Slot X The expansion card in slot X does not respond to an unmasked interrupt for a long time. Try to reboot. Valid only for EISA bus.

CH-2 Timer Error Second timer error. Some systems have two timers.

CMOS Checksum Error, CMOS Checksum Failure Incorrect CMOS checksum, which indicates data corruption in the CMOS, possibly due to a battery failure. If the attempt to restore the BIOS Setup fails, you may need to contact the service center with your motherboard.

CMOS Memory Size MismatchThe amount of physical memory on the motherboard does not converge with what was fixed in the CMOS RAM. You must restart the BIOS Setup, check all settings. After restarting the PC, the error may disappear, otherwise the motherboard components will need to be replaced.

CMOS System Options Not Set Data in CMOS is corrupted or missing. User actions are similar to the above.

CMOS Time and Date Not Set The date and time settings are violated or not set. The task is to check or set these parameters in the BIOS Setup.

CMOS battery failed, CMOS Battery Has Failed, CMOS Battery State Low These messages indicate the battery is malfunctioning or discharged when the computer starts up. You must replace the battery.

Cache Memory Bad, Do Not Enable Cache! Cache error. You may need a replacement. Although you should try to reboot first.

DMA # 1 Error, DMA # 2 ErrorError of the first / second DMA channel. An error can be caused by the corresponding peripheral device.

DMA Bus Time-out The device does not respond within 7.8 μs. The problem is in expansion cards. It is necessary to find a board that causes this error and replace it.

DMA ErrorDMA controller error. You may need to replace the motherboard.

Disk Boot Failure, Insert System Disk And Press EnterNon-loading disc. You need to boot from a floppy and check system files on the hard disk.

Diskette Boot FailureThe diskette in drive A: is not bootable, i.e. It is not possible to boot from a floppy disk while the PC is starting up. A floppy disk may not be bootable, or system files may be corrupted.

Diskette Drives Or Types Mismatch Error - Run Setup The types of drives actually installed in the system, and their descriptions in CMOS do not converge. You need to start the BIOS Setup and enter the correct drive types.

Display Switch Is Set Incorrectly, Display Switch Not ProperThe type of monitor (monochrome or color) is set incorrectly. Reposition the appropriate jumper on the motherboard in the correct position or fix the type of monitor in the BIOS Setup.

Display Type Has Changed Since Last Boot The display type has changed since the last boot. In the BIOS, enter the correct display type.

Error Encountered Initializing Hard Drive The hard drive is uninitialized. Check the installation of the hard disk controller (for legacy systems), connection cables, and BIOS Setup parameters.

Error Initializing Hard Drive Controller, Hdd Controller Failure Communication error with the hard disk controller, the hard disk controller is not initialized. Check the controller installation, drive connection, and hard disk settings in the BIOS Setup. Also it is worth checking the installation of jumper on the hard disk.

Expansion Board not ready at Slot X BIOS Can not find a card in slot number X. Check the board installation in this slot.

FDD Controller Failure Communication error with floppy controller. Check the drive connection and its resolution on the multicard (for legacy systems).

Floppy Disk Cntrlr Error Or No Cntrlr Present The floppy disk controller can not be initialized. Check the controller installation and the drive parameters specified in the BIOS Setup.

Floppy disk (s) fail You can not find or initialize the controller or the floppy disk drive itself.

Hard Disk Install Failure You can not find or initialize the controller or the hard drive itself. Actions are the same, i.e. Check all mechanical settings and connections, as well as the correct settings in the BIOS Setup.

Hard Disk (s) fail Error initializing the hard disk.

Hard disk (s) diagnosis fail Error initial hard disk diagnostics.

Fan or socket failure

The computer sees the hard drive, but can not start the system

Interpretation of error codes and messages

Interpretation of error codes and messages