Troubleshooting Guide - IBM T860 9494-HWN Service Manual

TROUBLESHOOTING GUIDE

NO POWER
(POWER INDICATOR OFF)
CHECK J801
INPUT VOLTAGE
(12V) ?
YES
CHECK J801
5VST VOLTAGE
(5V) ?
YES
CHECK
U501's PIN 6.
IS THIS PIN
OSCILLATED?
YES
TROUBLE
SOMEWHERE ELSE
1. NO POWER
NO
NO
NO
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TROUBLE IN
BULT-IN POWER
TROUBLE IN
BULT-IN POWER
TROUBLE IN
U501 or X501