LG Flatron L1742P - TROUBLESHOOTING GUIDE; Troubleshooting NO POWER Issue

TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER
(POWER INDICATOR OFF)
NO
Check Power Board,
And Find Out a Short Point
as Opening
Each Power Line
No Problem
1
Waveforms
U201-#96
Check Key Control
Connector Routine
Check U501
NO
NO
Check 3.3V Line
(Open Check)
Check 3.3V Line
NO
Check X-TAL
YES
Check J703 Voltage
Pin5, Pin6 (5V)?
Check
U601 Pin2 Voltage
(3.3V) ?
Is U201
Pin75 (3.3V)
Voltage ?
Check U201 Pin 96
Pulse
1
YES
YES
YES
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