IBM PS/1 User Manual

MAP 0010 (continued)
004 (continued)
– Disconnect the power on indicator lamp.
– 386SX machines: Check the voltage between J13 pin 1 on the
system board and frame ground.
– 486SX and 486DX (30-pin memory SIMM) machines: Check the
voltage between J11 pin 1 on the system board and frame ground.
– 486SX and 486DX (72-pin memory SIMM) machines: Check the
voltage at J26 pin 1 on the system board and frame ground.
– Power on the system unit.
IS THE VOLTAGE +5 V dc?
Yes No
005
The system board is failing.
006
The indicator lamp is failing.
007
– Listen carefully for any beeps during POST.
Note: Under certain failing conditions, POST may take up to 1 minute.
DID YOU HEAR A SINGLE SHORT BEEP AT THE END OF THE POST?
Yes No
008
DID YOU HEAR ANY BEEPS?
Yes No
009
Go to Step 016 on page 2-7.
010
(Step 010 continues)
2-6

IBM PS/1 Specifications

General

Processor	Intel 80286 or 80386
Processor Speed	10 MHz (80286)
RAM	1 MB (expandable to 2 MB or more)
Storage	40 MB hard drive
Floppy Drive	3.5" 1.44 MB
Graphics	VGA
Ports	Serial, Parallel, Mouse