No Raster - LG 22LN4000 Service Manual

2. No raster (Power LED blue, black screen)

NO RASTER

(Screen is not displayed)
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Insert the F/W back
or REPLACE LCD MODULE
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Only for training and service purposes
YES
YES
YES
YES
YES
YES
check open or short at Line.
NO
Check Line short or open between
NO
If there is any problem at Line,
Change IC701/IC704 or change IC600
check open or short at Line and waf er
NO
between IC702,IC703 and IC600.
If there is any problem at Line,
Change IC702,IC703 or IC600
It is not over 3V at 1pin of IC801.
NO
Or check Line short or open between
If LVDS cable isn't insulted enough,
NO
Insult LVDS cable until locking hook.
If LVDS cable have damage,
If is not under 1.5V at R744,
change Q702 or check open and short
NO
of Line among Q703 and Q702.
Of line between L710 and P101.
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or change Adapter
IV701/IC704 and IC600,
Change Q801.
R803 and 95pin of IC600.
Change IC 600.
Change LVDS cable
If is under 10.8V at L710,
Check open and short
LGE Internal Use Only