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2.) W / LED, No Backlight
Check CN902 pin2, 4 = 12V
Check ON/OFF signal
Check IC201 pin5=12V
Check IC201 PIN18 have the output of sawtooth wave at short
OK
Check PIN2 and PIN1 of Q204, Q208, Q209, and Q210
have the output of square wave at short time.
OK
Check PT201/PT202
Check D201/ D203/ D202/ D204/D206/ D209/D207/ D210
Check Q212/Q213/ Q214/ Q215
Check connecter & lamp
NG
OK
NG
OK
NG
OK
NG
NG
NG
OK
OK
Check adapter board
Check Main Board
Change Q207, Q205, Q206, ZD203
Change IC201
Check Q204/Q208/C202/C203/C206/C210
Check Q209/Q210/C229/C231/C233/C234/C235
Change PT201/PT202
39
ASUS MM19T
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