LG 42PX5R Service Manual page 24

6. In case of no normal XSTUDIO
(1) Symptom
LED is green
Ø
Don't enter EPF mode
Ø
Screen display but sound is not output
Ø
(2) Check following
Is the EPF cable
normal?
Yes
Is the EPF B/D
normal?
No
Replace IEPF B/D
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No
Is the EPF cable
connected well?
No
Cable inserts well.
No
Replace
VSC B/D
Yes
Replace EPF cable
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