Nortel North American DMS-100 Instruction Manual page 577

1-556 Trouble locating and clearing procedures (continued)
TOPS MPX Power-on self-test troubleshooting
Error Codes and Messages (Sheet 3 of 3)
Error Code
303
304
305
601
602
1101
2401
8601
8602
8603
10480
10481
10482
10483
10490
10491
12901
12902
297-8021-544 Standard 14.02 May 2001
Description of Failure or Error
Keyboard or system board
Keyboard clock failure
Keyboard +5v error
Diskette drive or controller
Diskette boot record
Async error
System board video
Mouse time-out
Mouse interface
Mouse interrupt
Drive C seek failure
Drive D seek failure
Drive failed controller test
Drive controller did not reset
Drive C read failure
Drive D read failure
Processor board test fails
Cache portion of processor board
test fails
If Suggest Action is
1
2
(continued)
Suggested Action
4
1
1
1
5
1
1
1
1
1
1
1
1
1
1
1
1
1
Do
Power off the PC and try the
procedure again. If the problem
persists, go to step 4.
This indicates the user has not
loaded the system software. Load
system software or the hardware
reference diskette and try the
procedure again.