ASUS MM19S
38
2.) W / LED, No Backlight
Check CN902 pin2, 4 = 12V
NG
OK
Check adapter board
Check ON/OFF signal
Check Main Board
NG
OK
Check IC201 pin5=12V
NG
OK
Change Q207, Q205, Q206, ZD203
Check IC201 PIN18 have the output of sawtooth wave at short
NG
OK
Change IC201
Check PIN2 and PIN1 of Q204, Q208, Q209, and Q210
have the output of square wave at short time.
NG
OK
Check Q204/Q208/C202/C203/C206/C210
Check Q209/Q210/C229/C231/C233/C234/C235
Check PT201/PT202
NG
Check D201/ D203/ D202/ D204/D206/ D209/D207/ D210
Check Q212/Q213/ Q214/ Q215
Check connecter & lamp
OK
Change PT201/PT202
OK
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