Vertical Bar/ Horizontal Bar - LG 42PJ350R Service Manual

Repair Process
PDP TV
Symptom
Check
defect type
Regular
Vertical
Line / Bar
Vertical
Line/Bar
Irregular
Vertical
Line / Bar
Half 1.Check X B/D
No picture 2.Replace Board
Check connection
Horizontal
of Connector (FPC)
Line/Bar
on Y Drive B/D
1.Connector re-connection
2.Eliminate foreign material on FFC
A. Picture Problem

Vertical bar/ Horizontal Bar

Check Module pattern
by using "TILT" key
on SVC R/C
Check connection
of Connector
Normal
(COF,TCP)
on CTRL B/D , X B/D
N
1.Connector re-connection
2.Eliminate foreign material on Connector
N
Normal
Picture?
Y
Close
Y
1. Check Y Drive B/D
Normal
2. Replace Board
N
Making
Revision
Y
Normal
Pattern?
N
1.Check CTRL B/D
※CTRL B/D: Control board
2.Replace Board
Y
1.Check CTRL B/D
2.Replace Board
Replace
Module
※ H-Line's Cause is rare CTRL B/D
N
Normal 1.Check CTRL B/D
Picture? 2.Replace Board
Y
Close
5
Replace
Module
Check Main B/D
N
Normal
Replace Module
Picture?
(If Main B/D doesn't cause)
Y
Close
N
Normal
Picture?
Y
Close
ⓒ LG Electronics. Inc.2009
Replace
Module