Troubleshooting Guide - LG FPD1570 Service Manual

NO POWER
(POWER INDICATOR OFF)
CHECK U15
INPUT VOLTAGE
(24V) ?
YES
CHECK
5VST VOLTAGE
(5V) ?
YES
CHECK
U4 PIN 6.
IS THIS PIN
OSCILLATED?
YES
TROUBLE
SOMEWHERE ELSE

TROUBLESHOOTING GUIDE

1. NO POWER
NO
NO
NO
TROUBLE IN
ADAPTOR or
INVERTER
TROUBLE IN
U15
TROUBLE IN
U4 or X2