LG 22LN4000 Service Manual

- 12 -
LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. Abnormal/No screen (All input)-Main PCBA
wGGs}kzGGf
s}kzGGGf
Abnormal/No screen
(all input)
jGG GG
GG wYWXG OjaXWSXXSYYSYZ
kaG_S`SXYSXZSX\SX]SX_SX`SYWS
YXSY\SY]SY^SY_SY`SZWP
YES
NO
YES
NO
YES
If LVDS cable isn’t insulted enough,
Insult LVDS cable until locking hook.
If LVDS cable have damage,
Change LVDS cable
1
Change module
WAVEFORMS
3
pGXY}G GXGG wXWXf
If is not under 1.5V at R744,
change Q702 or check open and short
of Line among Q703 and Q702.
If is under 10.8V at L710,
Check open and short
Of line between L710 and P101.
2
3
NO
Check open and short
Of line between Q703 and P101.
Or Check LVDS cable have damage.
Another is change IC600.
_S`SXYSXZSX\SX]SX_SX`SYWSYXS
Y\SY]SY^SY_SY`SZWwG GwYWX
OkGsP
XWSXXSYYSYZwG G wYWX
OjGP

LG 22LN4000 Specifications

General

Brand	LG
Model	22LN4000
Category	LED TV
Language	English