IBM PS/1, Техническое обслуживание оборудования

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016 (continued)
(From steps 005 and 008)
DID YOU RECEIVE A 129 ERROR?
Yes No
017
Go to Step 019.
018
– Check the cache jumper.
– Replace one bank of external cache at a time until the symptom goes
away. Refer to “486DX 25MHz/486DX2 50MHz or 486DX 33MHz/486DX2
66MHz (72-Pin Memory SIMM) System Board Layout” on page 5-17 for
cache locations. If the problem remains, replace the system board.
019
(From step 017)
DID YOU RECEIVE A 164 ERROR?
Yes No
020
Go to Step 065 on page 2-47.
021
– Press Enter.
– Use the “System Board Layout” charts on pages 5-2 through 5-13 and
“SIMM Identification” on page 1-20 to determine the amount of system
memory (RAM) installed on the system board. 1MB = 1024KB.
– 386SX system board:
If the “Shadow BIOS in RAM” is Yes, the memory size shown will be less
than the physical size of the installed memory (soldered and SIMMs) by
128K.
– 486SX and 486DX system boards:
The memory size shown will be less than the system memory (SIMMs) by
384K.
(Step 021 continues)
Diagnostic Information
2-39