Beep Codes

Written by | Tech

Being a Tech Support, already has its drawback. We are sometimes, too smart for our own good. hehehe… Anyway, troubleshooting a computer does has its advantage if you know the beep-codes or the P.O.S.T.

Below are some if not all information about beep codes.

Information where provided by Sir Dinds. More information about P.O.S.T. at

Beep codes are the beeps you hear from the PC speaker when you turn on your computer. They are your computer’s way of letting you know what’s going on when there is no video signal. These codes are programmed into the BIOS of the PC.

There are only 2 competing brand of BIOS, AMI (American Megatrends, Inc.) and Phoenix.

Here are the BEEP CODES for AMI BIOS:

no beep/s:
You’re supposed to hear at least one beep. If you truly don’t hear anything, either your computer’s power supply, motherboard, or PC speaker is no good.

1 short beep:
System RAM Refresh failure. Your programmable interrupt timer on your motherboard has failed. It could also be your interrupt controller, but either way, your motherboard will need to be replaced to fix it.

2 short beeps:
Your computer has memory problems. First, check video. If video is working, you’ll see an error message. If not, you have a parity error in your first 64K of memory. Check your SIMMs. Reseat them and reboot. If this doesn’t do it, the memory chips may be bad. You can try switching the first and second bank memory chips. First banks are the memory banks in which your CPU finds its first 64K of base memory. You’ll need to consult your manual to see which bank is first. If all of your memory tests good, you probably need to buy another motherboard.

3 short beeps:
The same as with 2 beeps; follow diagnosis above.

4 short beeps:
Your problem could be a bad timer. The system timer failed to work properly. It will require motherboard replacement.

5 short beeps:
CPU is busted. Replace the CPU or possibly the motherboard.

6 short beeps:
The chip on your motherboard that controls your keyboard isn’t working. First, try another keyboard. If that doesn’t help, reseat the chip that controls the keyboard, if it isn’t soldered in. If it still beeps, replace the chip if possible. The chip is error in the gate A20 switch that allows the system to run in virtual mode. Replace the motherboard if the chip is soldered in.

7 short:
Your CPU has generated an exception error. This could be a fault of the CPU or a combination of problems with the motherboard. Try replacing the motherboard.

8 short beeps:
Your video card isn’t working. Make sure it is seated well in the bus. If it still beeps, either the whole card is bad or the memory on it is. Your best bet is to install another video card.

9 short beeps:
ROM checksum error. This means that the checksum error checking value does not match the content of the BIOS ROM. This means the BIOS ROM is probably bad, and needs to be replaced.

10 short beeps:
Your problem lies deep inside the CMOS. All chips associated with the CMOS will likely have to be replaced. Your best bet is to get a new motherboard.

11 short beeps:
Your L2 cache memory is bad and your computer disabled it for you. You could reactivate it by pressing -Ctrl- -Alt- -Shift- -+- , but you probably shouldn’t. Instead, replace your L2 cache memory. Obviously, this could lead to outright motherboard replacement.

1 long, 3 short beeps:
Memory test failure. An error has been detected in the memory over the first 64K. Try replacing the memory, and if that doesn’t do it, the motherboard.

1 long, 8 short beeps:
Display test failure. Your video card is either missing or defective. Replace it. If its part of your motherboard, you’ll need to replace it or bypass it.

Last modified: January 2, 2009

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