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2.2 White
White Screen
Check power supply (for panel)
Y
N
Check Q24 0~3.3V（5V or 12V） ，according to the volitage）
Check signal output of U5/RTD2023B
N
Y
Y
N
Check U5
Check voltage of Q24
Check voltage between
Check LCD or
1,Power supply
Panel Connector
U25/SM5964 3thQ24 or
N
Y
2,Time circuit
check U25
Check voltage of Q24
Turn to power suppy
trouble shorting
N
Y
Check Q24（be care
Check circuit between
for the shorting）
CN8 and CN9
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