Haier HLE20BB Service Manual page 28

2.2 White
White Screen
Check power supply (for panel)
Y
N
Check Q23 0~3.3V（5V or 12V） ，according to the volitage）
Check signal output of U5/RTD2023B
N
Y
N Y
Check U5
Check voltage of Q24
Check voltage between
Check LCD or
1,Power supply
Panel Connector
U25/SM5964 Q24 PIN3 or
N Y
2,Time circuit
check U25
Check voltage of Q23
Turn to power suppy
trouble shorting
N Y
Check Q23（be care Check circuit between
for the shorting）
CN8 and CN9