LG V7550 Service Manual page 14

NO VIDEO
(POWER INDICATOR ON)
CHECK
POWER INDICATOR
GREEN or AMBER?
GREEN
CHECK
D712 ANODE
(-160V)?
YES
CHECK
G1 VOLTAGE?
(-70V~ -90V)
YES
CHECK
CDT HEAT
VOLTAGE?
(6.3V)
YES
TROUBLE IN
CDT
3. NO RASTER
AMBER
NO
NO
NO
- 14 -
DPM MODE
(NO H and/or V SYNC)
TROUBLE IN
D712
TROUBLE IN
Q799
TROUBLE IN
D941, Q942, Q941