Today my client arrived with a rather old computer to check the damage. Computers can not live at all, I suspect there is a problem with the switches that wear out. Then I switch between the ports of Power Switch and Reset Switch and the computer was able to work.
The next problem is the existence of 3x beep from speaker followed by a blank on the screen. There is no signal from computer which reaches computer monitor. Then I plug off the RAM from its slot, I clean up RAM, and then I plug it in again.
The problem is not solved, other problem occur, the sound 8x beep comes from the motherboard speakers. Then I try to plug off and clean the VGA/Video Graphic card and then I plug it in again. I turned on the computer and finally it can work as usual.
Here the AMI Beep Codes references from bioscentral.com. Thanks for help me during repair the computer.
| 1 short | DRAM refresh failure | The programmable interrupt timer or programmable interrupt controller has probably failed |
| 2 short | Memory parity error | A memory parity error has occurred in the first 64K of RAM. The RAM IC is probably bad |
| 3 short | Base 64K memory failure | A memory failure has occurred in the first 64K of RAM. The RAM IC is probably bad |
| 4 short | System timer failure | The system clock/timer IC has failed or there is a memory error in the first bank of memory |
| 5 short | Processor error | The system CPU has failed |
| 6 short | Gate A20 failure | The keyboard controller IC has failed, which is not allowing Gate A20 to switch the processor to protected mode. Replace the keyboard controller |
| 7 short | Virtual mode processor exception error | The CPU has generated an exception error because of a fault in the CPU or motherboard circuitry |
| 8 short | Display memory read/write error | The system video adapter is missing or defective |
| 9 short | ROM checksum error | The contents of the system BIOS ROM does not match the expected checksum value. The BIOS ROM is probably defective and should be replaced |
| 10 short | CMOS shutdown register read/write error | The shutdown for the CMOS has failed |
| 11 short | Cache error | The L2 cache is faulty |
| 1 long, 2 short | Failure in video system | An error was encountered in the video BIOS ROM, or a horizontal retrace failure has been encountered |
| 1 long, 3 short | Memory test failure | A fault has been detected in memory above 64KB |
| 1 long, 8 short | Display test failure | The video adapter is either missing or defective |
| 2 short | POST Failure | One of the hardware testa have failed |
| 1 long | POST has passed all tests |