LG Flatron L226WTQ Service Manual page 16

2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK J905
1
VOLTAGE PIN5,6
(5V)?
YES
2
J905 PIN9 3.3V?
YES
3
CHECK J905
PIN10
YES
CHECK
PULSE AS
CONTACTING PROBE
4
TO THE LAMP
WIRE OF THE
LCD MODULE
YES
REPLACE LCD MODULE
3 J905-#10 (Brightness 100)
- 16 -
NO
NO
1. CONFIRM BRIGHTNESS
NO
2. CHECK MICOM DIM-ADJ
NO
1
J905-#5,6
3 J905-#10 (Brightness 0)
CHECK POWER BOARD
(LIPS)
CHECK U501 INVERTER
ON/OFF PORT
OSD CONTRL STATUS
PORT
POWER BOARD (LIPS)
Waveforms
2
J905-#9
5 LAMP CURRENT