IBM PS/1, Hardware Maintenance Service

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MAP 0200 (continued)
078 (continued)
IS YOUR SYSTEM BOARD A 486SX OR A 486DX (WITH 30-PIN
MEMORY SIMMS)?
Yes No
079
IS YOUR SYSTEM BOARD A 486SX, 486DX, OR 486DX2 (WITH
72-PIN MEMORY SIMMS)?
Yes No
080
You should have a 386SX 25MHz.
The error message displayed indicates the failing SIMM by posi-
tion. Refer to “386SX 25MHz (72-Pin Memory SIMM) System
Board Layout” on page 5-3 and “386SX 25MHz (72-Pin Memory
SIMM) System Board Layout” on page 5-5.
– Make a note of the error.
– Power off the system unit.
– If there are two SIMMs installed, swap the SIMMs. If there is
one SIMM installed, move it to the other socket.
– Power on the system unit.
– If you get a POST error, press Esc.
– Run the memory test.
DID YOU RECEIVE AN ERROR?
Yes No
081
Run the system memory test several times to verify the
failure symptom no longer exists.
Note: You may have a failing system board SIMM
socket. Test this by returning the SIMMs to the
original sockets and running the memory test. If
the symptom returns, you have a failing system
board.
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