Haier LT22M1CWA Service Manual page 32

22"LCD TV
W / LED, No Backlight
Check the 16V voltage
input to the inverter part
Check ON/OFF signal
Check IC801 PIN15 have the output of square wave at short time
Check the input of Q805, Q806
Check connecter & lamp
OK
NG
OK
Check IC801 pin2=5V
NG
OK
NG
OK
NG
OK
Check the output of PT801
NG
OK
NG
Check adapter or MB
Check Interface board
Change ON/OFF
Change IC801
Change PT801, PT802
Change Q805, Q806,D801,D802,D803,Q804
32
Haier LT22M1CWA&LT22M1CW