TROUBLESHOOTING

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BEEPS ERROR MESSAGE
1’s - System RAM refresh failure the programmable interrupt timer (PIT) or programmable interrupt controller (PIC) has probably failed. Replace the motherboard.

2’s - Memory parity error. A parity error has been detected in the first 64KB of RAM. The RAM IC Is probably defective. Replace the memory or motherboard.

3’s - Base 64KB memory failure. A memory failure has been detected in the first 64KB of RAM. The RAM IC Is probably defective. Replace the memory or motherboard.

4’s - System timer failure. The system clock/timer IC has failed.

5’s - CPU failure. The system CPU has failed. Try replacing the motherboard or CPU.

6’s - Gate A20 failure. The keyboard controller IC has failed, so Gate A20 Is no longer available to switch the CPU into protected mode. Replace the keyboard controller or motherboard.

7’s - Exception error. The CPU has generated an exception error because of a fault in the CPU or some combination of motherboard conditions. Try replacing the motherboard.

8’s – Video memory read/write error. The system video adapter is missing or defective. Try replacing the video adapter.

9’s – ROM checksum error. The contents of the system BIOS ROM do not match the expected checksum value. The BIOS ROM is probably defective and should be replaced.

10’s – CMOS shutdown register read/write error. The shutdown register for the CMOS memory has failed. Try replacing the RTC/CMOS IC.

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