Abnormal/No Screen (All Input)-Main Pcba - LG 22LN4000 Service Manual

3. Abnormal/No screen (All input)-Main PCBA

Abnormal/No screen
(all input)
1
2
3
Change module
WAVEFORMS
3
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Only for training and service purposes
YES
YES
YES
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.
If is under 10.8V at L710,
Of line between L710 and P101.
NO
Of line between Q703 and P101.
Or Check LVDS cable have damage.
Another is change IC600.
- 12 -
Change LVDS cable
Check open and short
Check open and short
LGE Internal Use Only