LG FLATRON L1550S-SN - No Raster (LIPS) Troubleshooting

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2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
NO RASTER
(OSD IS NOT DISPLAYED)
NO
NO
NO
NO
REPLACE CCFL LAMP
IN THE LCD MODULE
CHECK POWER BOARD,
AND FIND OUT A SHORT
POINT AS OPENING
EACH POWER LINE
CHECK MICOM INV
ON/OFF PORT.
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT
LIPS
YES
YES
YES
YES
J707
PIN5, PIN6
5V?
J707 PIN2
2.5V?
J707 PIN1
5V?
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?