(continued)

006(continued)

ARE

THE

VOLTAGES

CORRECT

AND

DOES

THE

FAN RUN?

 

 

 

 

 

 

Yes

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

007

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace

the

power

supply.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

008

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

– The

power

supply is working normally. (If you suspect the

on/off

switch

 

cable assembly, see Step 009.) If the fan continues to run

when

all

 

connectors

are

 

plugged

back in, go to “Undetermined Problem” on

 

 

page 2-56.

If

the

fan

stops

running when

a drive

connector

is plugged

 

back

in,

go

to

“Factory-Installed

Drive

Devices”

on page 2-47.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

009

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(From

steps

003

and

008)

 

 

 

 

 

 

 

 

 

DOES

THE

SYSTEM

UNIT

FAIL TO

SHUT

OFF

WHEN

THE

ON/OFF

 

 

 

 

 

SWITCH

 

IS

PRESSED?

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

010

Go to Step 006 on page 2-34.

011

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

– You

might

have

a

failing

on/off

switch cable assembly.

– Disconnect

the

on/off

switch

cable assembly connector from the power

 

supply

connector

and

take

an

ohm

reading.

DO

YOU

HAVE

AN

OHM

READING

WHEN THE

SWITCH

IS

PRESSED

AND

AN

OPEN

READING

WHEN

THE

SWITCH IS

RELEASED?

 

Yes

No

 

 

 

 

 

 

 

 

 

012

– Replace the on/off switch cable assembly.

013

– Replace the system board.

2-36

Page 92
Image 92
IBM 2142, 2140 manual Are, Fan Run?, Unit, On/Off, Pressed