W / Led, No Backlight - BenQ E2220HD Service Manual

21.5" LCD Color Monitor

(2). W / LED, No Backlight

Check Inverter input =16V
Check ON/OFF signal
Check IC801 PIN 11=5V
Check IC801 PIN8/PIN9 PWM wave
Check Q805, Q806 Drain wave
Check the output of PT801
Check connecter & lamp, feedback and protect circuit
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
Check adapter and F801
Check Interface board or main board
Change ON/OFF circuit
Check IC801
Change Q805, Q806
Change PT801
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BenQ E2220HD