Suppose that squeals the computer when it is turned on and the image does not appear on the screen. Should I call a wizard immediately or can I solve the problem myself? Ideally, of course, it is better that the repair is done by a person who understands this. However, if there is no time to wait for the master or you just want save on repairs, then you can use the tips in this article. Many malfunctions can be caused by poor contact and such a problem can be fixed by yourself.
To solve the above problems, please understand: if the whistle indicates CPU heating, for example, the orientation is that you immediately turn off the machine and call the technician. You can try deleting and re-inserting them.
If you start the computer screen black
If this does not work, try removing the newly installed components before crashing.
If the screen opens when you open the program
Let's consider in this article how to recognize and try to fix the hardware errors of our fixed PC, interpreting sound signals, which are displayed when the computer starts.Why does the computer squeak?
In the event of a malfunction, the system notifies us by a combination of audio signals that tell us what kind of malfunction has arisen. In fact, the sound signal is given even if everything is in order - 1 short.
What are the BIOS signals?
Before you start diagnostics, it is better to disconnect all unnecessary (keyboard, mouse, printer, flash drive, etc.).
RAM error
Although these memories could be erased, it did not foresee that they can easily be rewritten if they have a suitable programmer, and yet the firmware was never available. These are short beeps, separated by a short or long pause. Obviously, this is dedicated to those who are familiar with the system equipment and do not bear any responsibility for the damage that may occur to you.
If this is the case, just open the computer case and replace the battery that we see somewhere on the motherboard. Obviously, after replacing the battery, you must set the date, time and all operating parameters again. In other cases, just do a little cleaning to get it back in place or replace the memory modules.
Most often you can hear the following signals:
Troubleshooting and Troubleshooting
After you managed to identify the problem by the sound signal, you can try to fix it. Turn off the computer from the wall outlet and follow the steps below in order, depending on what problem you were able to recognize (RAM, video card or power supply).Check the computer for activation after completing each item.
Errors of the video card. The classic error related to the error of the video card is that it is slightly offset from the case. In this case, just open the case, find the video card, remove the screw that holds it in place, connect it well and screw it back in again. Sometimes it can be an incorrect video card. In any case, if the video card is connected well, we are trying to start the computer by turning off the monitor.
If you are well versed in electronics, you can also check the printed circuit board of the video card: there is always a group of electrolytic capacitors, more than others. Slowly, but consistently, our smartphones are growing, becoming smarter and easier to configure to meet most of our IT needs. The development of powerful applications has stimulated the promotion of smartphones, so much of what we do on our cell phones, from the point of view of artificial intelligence, is not yet possible on conventional computers.
RAM error
- Remove all the memory slots except one (if you have more than one).
- Move the memory to another slot.
- Pull out the memory bar, clean the pins and insert them back into the slot.
- Replace the memory.
More details on how and how to clean contacts random access memory shown in the article.
Note: the signals are short, as well as long
Here's how to create backup copy system registry. Close Registry Editor and turn off the computer. Open the control panel Power Options Set up the power buttons. Click "Change settings not available" here. At the bottom of the window, disable the Enable Quick Launch option.
The computer squeaks and does not turn on
Save and then shut down the computer. Do not log in and restart the computer. Now numeric keypad enabled. No response to your computer can have the following reasons. Computers have indicators that highlight whether the device is powered. To solve the problem of power shortage, try the following solutions.
Video card error
- Pull out the video card and paste it back.
- Remove the video card, clean the contacts with an eraser and insert it back into the slot.
- Replace the graphics card.
Contacts of the video card are cleaned in the same way as the RAM contacts.
Problems with the power supply
- Open the power supply and look for the presence of blown condensers. If detected, ask someone to solder bad capacitors if you can not handle the soldering iron yourself.
- Replace the power supply.
In the event that your computer generates combinations of audio signals other than those described above, then use the tables of the leading BIOS manufacturers, such as Award BIOS and AMI BIOS.
AWARD BIOS - Signal Value
Disconnect and reconnect the power cord that is plugged into the computer's power outlet and turn on the computer.
- Plug the power cord into another outlet and turn on the computer.
- Replace the power cord of the computer with the power cord of the monitor and turn on the computer.
Also try another proven power source. . If the computer does not pass one of the tests, the startup procedure will be stopped. If your computer does not start, find additional ways to troubleshoot the problem. Start by selecting operating system.
Award BIOS signals
| Error Description | |
|---|---|
| 1 signal and blank screen | No errors found |
| 2 short | Minor errors were found. A prompt appears on the monitor screen to enter the CMOS program Setup Utility and correct the situation. Check the reliability of the connectors in the connectors hard drive and motherboard. |
| 3 long | Keyboard controller error |
| 1 long, 1 short | RAM error |
| 1 long, 2 short | Video card error |
| 1 long, 3 short | No video card or video memory error |
| 1 long, 9 short. | Error reading from ROM |
| Recurring short | Problems with the power supply; Problems with RAM |
| Repeating long | Problems with RAM |
| Cyclically alternating two sound tones. | CPU problems |
| Continuous. | Problems with the power supply |
AMI BIOS signals
| Sequence of sound signals | Error Description |
|---|---|
| 1 short | No errors found |
| 2 short | Error parity RAM or you forgot to turn off the scanner or printer |
| 3 short | Error in the first 64 KB of RAM |
| 4 short | Malfunction of the system timer. Replace the motherboard. |
| 5 short | Problems with the processor |
| 6 short | Keyboard controller initialization error |
| 7 short | Problems with the motherboard |
| 8 short | Memory card error |
| 9 short | The checksum of the BIOS is incorrect |
| 10 short | Error writing to CMOS |
| 11 short | Cache error on the motherboard |
| 1 long, 1 short | Problems with the power supply |
| 1 long, 2 short | Video card error (Mono-CGA). Faulty RAM connectors. Replace the motherboard. |
| 1 long, 3 short | Video card error (EGA-VGA), on server motherboards - the wrong type of memory is installed |
| 1 long, 4 short | Lack of video card |
| 1 long, 8 short | Problems with the video card or not connected to the monitor |
| 3 long | RAM - the read / write test is completed with an error. Reinstall the memory or replace it with a working module. |
| 5 short, 1 long | RAM is not installed or installed in a manner not recommended by the manufacturer. |
| Continuous sound signal | Memory, power supply, or computer overheating problem |
With each new inclusion personal computer starts automatic program POST (Power-On-Self-Test) self-test diagnostics. Which is "written" in the BIOS BIOS. Dear friends, visitors, site visitors and just familiar personalities! In this small post I would like to give some examples of tables with decoding PC signals.
First of all, to use these tables you will need to find out the BIOS manufacturer of your motherboard. The BIOS manufacturer is easy to learn, you need to go into the BIOS itself, (description below) and find the manufacturer's signature.
A few words about the diagnostic program POST - this program checks all the most important components of a personal computer, such as: monitoring the health of the processor, CMOS, supporting motherboard chips, and of course produces a quick test of RAM. All this information about the health of the PC, the computer gives a micro speaker in the form of a sound signal, (beep).
If the POST program has successfully completed the diagnostics of the most important components of the computer and if the PC is working in excellent condition, then you should hear one short beep(beep) , after which the PC operating system will start immediately. If an incompetent component is detected when the computer starts, the programPOST immediately give out a certain sound signal, (several short or several long beeps), thereby determining the detected error, respectively, the computer stops working.
How to enter into Windows BIOS 7:
In order to enter the BIOS with Winows 7 or XP, we need to press a certain key or set of keys immediately after the PC is turned on, respectively before the operating system of the computer boots.
As soon as you restarted the computer, it is better to press a certain key at once, or a set of keys, and it is desirable to click it before entering the BIOS menu.
BIOS key combinations:
- F1
- F2
- F10
- Esc
- Ctrl + Alt + Esc
- Ctrl + Alt + Ins
- Ctrl + Alt
Diagnostic program POST and computer sound signals:
AWARD BIOS:
| Sequence of sound signals | Error Description |
| 1 short | Successful POST |
| 2 short | Minor errors were found. A screen prompts you to enter the CMOS Setup Utility and correct the situation. Check the reliability of the loops in the connectors of the hard drive and the motherboard. |
| 3 long | Keyboard controller error |
| 1 short, 1 long | RAM error |
| 1 long, 2 short | Video card error |
| 1 long, 3 short | Video Memory Error |
| 1 long, 9 short | Error reading from ROM |
| Recurring short | Problems with the power supply; Problems with RAM |
| Repeating long | Problems with RAM |
| Repeated high-low frequency | CPU problems |
| Continuous | Problems with the power supply |
AMI BIOS:
| One short signal | |
| Two short beeps | RAM Test Error |
| Three short beeps | RAM test error (first 64 kb) |
| Four short beeps | The motherboard is faulty, (system timer error) |
| Five short beeps | The processor is faulty. Try to remove the processor and install it again, (if not afraid). If it does not help, then you need a processor replacement. |
| Six short beeps | The motherboard is faulty, (keypad controller error) |
| Seven short signals | The motherboard is faulty, (virtual mode error). Try to restart the computer, if it does not help, then only the replacement of the motherboard. |
| Eight short signals | Defective video adapter or video memory test error |
| Nine short signals | BIOS ROM checksum error |
| Ten short beeps | Error writing to CMOS memory. It is necessary to "reset" the BIOS memory, then by bridging the two contacts next to the battery (Clear CMOS), or remove the battery for 20 minutes by disconnecting the power cord. If it does not help, you'll have to change the microcircuit. |
| Memory errors. Try the memory slots to reinstall. | |
| (One long and two short ones), (One long and three short ones), (One long and eight short) | The video card is malfunctioning. |
DELL BIOS:
| Single signal, pause, two beeps | Video card error. It is necessary to check the connection of the video card |
| One signal, a pause, two signals, a pause, two signals, a pause, three signals | BIOS chip error |
| One signal, a pause, three signals, a pause, one signal, a pause, one signal | BIOS chip error |
| One signal, a pause, three signals, a pause, one signal, a pause, three signals | The keyboard is broken |
| One signal, a pause, three signals, a pause, three signals, a pause, one signal | |
| One signal, a pause, three signals, a pause, four signals, a pause, one signal | |
| Single signal, pause, three beeps, pause, four beeps, pause, three beeps | Error checking RAM. It's worth checking the memory |
| Single signal, pause, four signals, pause, one signal, pause, one signal | an error checking RAM. It's worth checking the memory |
IBM BIOS:
AST BIOS:
| One short signal | The processor is faulty |
| Two short beeps, (Three short beeps) | |
| Four short beeps | The keyboard is broken |
| Five short beeps | The keyboard is broken |
| Six short beeps | The system board is faulty |
| Nine short signals | The BIOS chip is faulty |
| Ten short beeps | Timer chip defective |
| Eleven short signals | The chipset driver is defective |
| Twelve short beeps | Power failure of non-volatile memory |
| One long signal | Chip dMA controller defective (channel 0) |
| The DMA controller chip is faulty (channel 1) | |
| Video adapter is defective | |
| One long and three short beeps | Memory Malfunction of the Video Adapter |
| One long and four short beeps | Video adapter is defective |
| One long and five short beeps | Memory is faulty |
| One long and six short beeps | Errors of loading the interrupt vector into memory |
| One long and seven short beeps | Video equipment is not damaged |
| One long and eight short beeps | Video memory malfunctioning |
Compaq BIOS:
| One long signal | The POST diagnostic program has not detected any errors, it works fine. All OK. |
| One long and one short beep | The BIOS memory checksum is incorrect. It is necessary to check the battery serviceability |
| Two short beeps | General error |
| One long and two short beeps | The video card is faulty. You must reinstall the graphics card |
| Seven Signals | The AGP card is faulty. You must reinstall the graphics card |
| One long (repetitive) | Memory is faulty |
| One short and two long beeps | Memory is faulty |
Phoenix BIOS:
The signals of this BIOS go through a pause with short beeps. For example - 1-2-1 ( 1 signal, pause, 2 signals, pause, 1 signal)
| One signal, a pause, one signal, a pause, three signals | An error occurred while accessing BIOS memory |
| One signal, one pause, one signal, pause, four beeps | The BIOS memory checksum is invalid. It is necessary to check the battery serviceability |
| One signal, a pause, two signals, a pause, one signal | The motherboard is faulty |
| One signal, a pause, two signals, a pause, two signals (One signal, a pause, two signals, a pause, three signals) | The DMA controller chip is faulty |
| Single signal, pause, four signal, pause, one signal | The motherboard is faulty |
| Single signal, pause, four beeps, pause, two beeps | Memory is faulty |
| Single signal, pause, four signal, pause, three beeps | System timer error |
| Single signal, pause, four signal, pause, four beeps | Malfunction of one of the I / O ports |
| Two signals, a pause, one signal, a pause, one signal, (Two signals, a pause, one signal, a pause, two signals), (Two signals, pause, one signal, pause, three signals), (Two signals, pause, one signal, pause, four signals) | Memory is faulty |
| Two signals, a pause, two signals, a pause, one signal, (Two signals, a pause, two signals, a pause, two signals), (Two signals, a pause, two signals, a pause, three signals), (Two signals, pause, two signal, pause, four signals) | Memory is faulty |
| Two signals, a pause, three signals, a pause, one signal, (Two signals, a pause, three signals, a pause, two signals), (Two signals, a pause, three signals, a pause, three signals), (Two signals, a pause, three signal, pause, four signals) | Memory is faulty |
| Two signals, a pause, four signals, a pause, one signal, (Two signals, a pause, four signals, a pause, two signals), (Two signals, a pause, four signals, a pause, three signals), (Two signals, pause, four signal, pause, four signals) | Memory is faulty |
| Three signals, a pause, one signal, a pause, one signal | Second DMA channel is defective |
| Three signals, a pause, one signal, a pause, two signals, (Three signals, a pause, one signal, a pause, four signals) | The first DMA channel is defective |
| Three signals, a pause, two signals, a pause, four signals | Keypad controller is defective |
| Three signals, a pause, three signals, a pause, four signals | Video memory is faulty |
| Three signals, a pause, four signals, a pause, one signal | The monitor is defective |
| Three signals, a pause, four signals, a pause, two signals | BIOS chip malfunction |
| Four signals, a pause, two signals, a pause, one signal | The system timer is faulty |
| Four signals, a pause, two signals, a pause, two signals | End of test |
| Four signals, a pause, two signals, a pause, three signals | Keypad controller is defective |
| Four signals, a pause, two signals, a pause, four signals | When switching to protected mode, the processor crashed |
| Four signals, a pause, three signals, a pause, one signal | RAM error |
| Four signals, a pause, three signals, a pause, two signals, (Four signals, a pause, three signals, a pause, three signals) | Timer error |
| Four signals, a pause, four signals, a pause, one signal | Serial Port Fault |
| Four signals, a pause, four signals, a pause, two signals | Parallel port malfunction |
| Four signals, a pause, four signals, a pause, three signals | Malfunction of the processor |
| Long repeating | The motherboard is faulty |
| Continuous | The fan is defective (cooler) of the processor |
| Siren | The video card is faulty |
Attention: Do not take this information as absolutely reliable, as the audio signals may change as new versions of the BIOS are released. On this I end this post, I hope it turned out useful.
With respect,
