LG FLATRON W2243T Service Manual page 24

NO Raster
(Lamp Off)
Check C804 (+)
=16V
YES
Check ON/OFF
signal
YES
CheckIC801 pin
11=5V?
YES
Check IC801
Pin8/pin9 have the
output of sawtooth
YES
Check Q805/Q806
pin5/pin8 is 16V?
YES
Check PT801
pin7/pin8= 650V?
Replace backlight
6. RASTER
NO
Check power section
NO
Check Interface section or
main board
NO
Check C808, C809, C810
NO
Check IC801 pin 1/pin 14
NO
Cut all the pin connector of
Q805/Q806, check C804 (+) =16V?
YES
Replace Q805/Q806
NO
Unplug backlight connector wire,
check PT801 pin7/pin8 = 650V?
YES
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NO
Replace IC801
Check C808, C809,
NO
C810
NO
Replace PT801