LG LCD 782LS Service Manual page 13

NO RASTER
CHECK
J702 PIN 1, 2, 3
(12V) ?
YES
CHECK
J702 PIN 8 (5V) ?
YES
CHECK
X501
H. PULSE ?
YES
CHECK
U201(GM5020) ?
YES
CHECK
L201, L202, L203
PULSE?
2. NO RASTER
NO
NO
NO
NO
NO
- 13 -
TROUBLE IN
POWER ADATER
or L703, L704
TROUBLE IN
INVON PATTERN
TROUBLE IN
X501
TROUBLE IN
U201
TROUBLE IN
U201