No Picture - Sony KDL-32R420A Service Manual

3-3. NO PICTURE

No picture
No
Press HOME Key.
Menu displayed?
Yes
Change Equipment
No display
Or Player to check
TV display
OK
Signal or Equipment
Problem
KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK)
Check the harness Replace
OK
PSU to Panel PSU to Panel
Harness
connection
NG
OK
Fix the harness
Harness issue
connection
Change
Main board
Check the FFC(LVDS)
NG
PSU to Panel
connection
Symptom
NG
improvement
Fix the FFC(LVDS)
connection
NG
Change PSU
Symptom
OK
improvement
PSU issue
TROUBLE SHOOTING
Replace the
OK
NG
FFC(LVDS) Between
PSU and Panel
OK
FFC(LVDS) issue
Change
Panel
NG
Change
Main board
OK
Main board issue
25