Vertical Bar/ Horizontal Bar - LG 42PT250 Service Manual

Repair Process
PDP TV
Symptom
☞A19
Check
defect type Regular
Vertical
Line / Bar
Vertical
Line/Bar
Irregular
Vertical
Line / Bar
☞A18
Half 1.Check X B/D
No picture 2.Replace Board
☞A20
Check connection
Horizontal
of Connector (FFC)
Line/Bar
on Y Drive B/D
©
Copyright
A. Picture Problem

Vertical bar/ Horizontal Bar

☞A1
Check Module pattern
by using "TILT" key
on SVC R/C
☞A20
Check connection
of Connector
(COF,TCP)
on CTRL B/D , X B/D
1.Connector re-connection
2.Eliminate foreign material on Connector
Normal
Picture?
Y
Close
☞A16
Y
1. Check Y Drive B/D
Normal
2. Replace Board
N
1.Connector re-connection
2.Eliminate foreign material on FFC
Normal
Pattern?
N
☞A13
1.Check CTRL B/D
2.Replace Board
☞A13
Y
1.Check CTRL B/D
Normal
2.Replace Board
N
N
Replace
Module
Normal
Picture?
Y
Close
5
Making
Revision
Y
Replace
Module
※CTRL B/D: Control board
N
Normal
Picture?
(If Main B/D doesn't cause)
Y
Close
※ H-Line's Cause is rare CTRL B/D
N
1.Check CTRL B/D Normal
2.Replace Board Picture?
Close
5/10
Check Main B/D
Replace Module
N
Replace
Module
Y
LGE Internal Use Only