Acer AL1713bm Servicehandleiding - Pagina 32

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3.2 Backlight can't be turned on
Check U1 Pin6 Voltage
Check U1 Pin1 Voltage
and Pin7 Open or Short
No Raster
LED Green
Backlight cannot be
turned on.
YES
Is the voltage 12V at
CN852#6?
YES
is 5V
YES
is high
YES
Check T1 or T2 Pin6
Change T1 or T2
NO
NO
Check U2&U3
31
Check R1