LG Flatron L226WTQ

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