LG Flatron W2442PA - TROUBLESHOOTING: NO RASTER (LIPS); LIPS Board Related No Raster

2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
CHECK U501 INVERTER
ON/OFF PORT
P402 PIN9 5V?
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK POWER BOARD
(LIPS)
CHECK P402
VOLTAGE PIN5,6
(5V)?
NO
NO
NO
NO
1. CONFIRM BRIGHTNESS
OSD CONTRL STATUS
2. CHECK MICOM DIM-ADJ
PORT
CHECK P402
PIN10
POWER BOARD (LIPS)
CHECK
PULSE AS
CONTACTING PROBE
TO THE LAMP
WIRE OF THE
LCD MODULE
REPLACE LCD MODULE
YES
1
2
3
YES
YES
YES
Waveforms
1
P402-#5,6
2 P402
-#10
3
LAMP CURRENT
- 16 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only