LG SDM-S74 Service Manual page 16

2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS
NO RASTER
(OSD IS NOT DISPLAYED)
CHECK J705
PIN 5, 6, 8(5V)
PIN 1, 2(12V)?
YES
CHECK
J705 PIN 9
5V?
YES
CHECK
J705 PIN 10
5V?
YES
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?
YES
REPLACE CCFL LAMP
IN THE LCD MODULE
NO
NO
NO
NO
- 16 -
CHECK LIPS
CHECK MICOM INV
ON/OFF PORT.
1. CONFIRM BRIGHTNESS
OSD CONTRL STATE.
2. CHECK MICOM DIM-ADJ
PORT
LIPS