4-12 Maintenance and Troubleshooting
Beep Codes
One beep indicates that the system has completed its power-on self-test. If a long beep or a
series of long beeps occur, power off the computer and try again. If the long beeps persists,
see Table Section 4-8 for the diagnostic beep codes.
The beep codes are announced on the speaker only if a fatal failure is detected. For instance,
three long beeps indicates a failure in the first 64 K of RAM.
Table Section 4-8 Diagnostic Beep Codes
Message
Beeps
Description of Failure
Refresh Failure
1
The memory refresh circuit on the system board is
faulty.
Base 64 KB Memory Failure
3
Memory failure in the first 64 KB.
Timer Not Operational
4
Memory failure in the 64 KB of memory or timer 1
on the system board is not functioning.
Processor Error
5
The CPU on the system board generated an error.
8042 – Gate A20 Failure
6
The keyboard controller (8042) may be bad. The
BIOS cannot switch to protect mode.
Processor Exception Interrupt
Error
7
The CPU generated an exception interrupt.
Display Memory Read/Write
Error
8
The system’s video adapter is either missing or its
memory is faulty. This is not a fatal error.
ROM Checksum Error
9
ROM checksum value does not match the value
encoded in the BIOS.
CMOS Shutdown Register
Read/Write Error
10
The shutdown register for CMOS RAM failed.
Cache Error
11
The cache is faulty.
CMOS Battery Replacement
Remove the 3-volt lithium battery from system board as follows.
1.
Turn off and unplug the system unit and any external option connected to it.
2.
Remove the system unit cover.
Содержание POWERMATE PRO2180 - SERVICE 1996
Страница 140: ...4 14 Maintenance and Troubleshooting ...
