No Picture/No Sound - LG 50PW450 Service Manual

Repair Process
PDP TV
Symptom
☞A1
Check Module pattern
by using "TILT" key
Normal
on SVC R/C
No Picture/ Sound Ok
Section
Check
"Speaker ON/Off" setting
in OSD Menu
A. Picture Problem

No Picture/No Sound

☞A2
Y Check
Sound
Sound
N
Move
Check Speaker
N
Normal
jack connection
Sound?
& Speaker Cable open
Y
Close
Y
Check
LVDS Cable
OK
N
N
Normal
Sound?
Y
Close
2
Making 2010. 11. 16
Revision
Y
Picture
Close
OK
N
☞A6
Check
Video
Apply
Y
SVC
SVC Bulletin
Bulletin?
(S/W Upgrade etc)
N
Check 17V
Normal
(Audio IC B+)
voltage?
on Power B/D
Y
Check Audio IC Short
Replace Main B/D
ⓒ LG Electronics. Inc.2010
전자 - 6-2
2/10
Close
Y
Normal
Sound?
N
N
Check Power B/D
Replace Power B/D