LG E2042T-BN - Manual (Page 13)

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TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
CHECK IC103
NO
NO
NO
CHECK CRYSTAL(X100)
YES
YES
1
2
1 3
1 4
Waveforms
1 2 3 4
Copyright
Only for training and service purposes
LGE Internal Use Only
2010 LG Electronics. Inc. All right reserved.
1.2V
YES
CHECK
IC102 PIN3(5V)
IS IC103 PIN25(3.3V)
PIN27(1.2V)
CHECK IC103 PIN 42,43
PULSE
CHECK ADAPTER(19V)
CHECK IC102 PIN3 (5V)
IC102 PIN3 (5V) IC103 PIN27 (1.2V) IC103 PIN 25 (3.3V) IC103 PIN42,43