LG Flatron L1900J - 2. NO RASTER (OSD IS NOT DISPLAYED) - INVERTER

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2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER
NO RASTER
(OSD IS NOT DISPLAYED)
NO
NO
NO
NO
REPLACE CCFL LAMP
IN THE LCD MODULE
CHECK POWER LINE,
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
INVERTER
P304
PIN1, PIN2
12V?
P304 PIN7
5V?
P304 PIN6
PWM WAVEFORM
CHECK
PULSE AS
CONTACTING SCOPE
PROBE TO CAUTION LABEL.
(CONTACT PROBE TO
CAUTION LABEL.
CAN YOU SEE PULSE
AT YOUR
SCOPE?
YES
YES
YES
YES