BUFFALO FTD-G931AS/BK
19
No Backlight
Check AC line volt 110V or 220V
OK
Check AC line
Check the voltage of C905(+)
Check F901, bridge rectified circuit
Check start voltage for the pin3 of IC901
Check R906, R907, IC901
Check the auxiliary voltage is between 10V-16V
1) Check IC901,T901
2) Check ZD901
3) Check D902/D903
OK
Check D910, D911, IC902
OK
NG
NG
No power
NG
NG
OK
Check C223 (+) =12V