Read LG Z42PT320-UC (CHASSIS:PU14K) Service Manual online
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Check P301 All
Voltage Level (16V,5V)
Check Power connector
OK ?
Replace Power board
Y
N
Y
Check C311
Voltage Level 5V
Replace Q302
Y
N
Check IC303 (pin2)
Voltage Level 3.3V
Replace IC303
Y
N
Check IC203 Flash Memory
Check IC302 (pin2) Output
Voltage Level (3.3V)
Replace IC302
N
Y
Power-Up Boot Fail
Trouble Shooting Guide
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