No Picture From One Or All Inputs (Osd And Sound Ok) - Panasonic TH-42PX75U Technical Manual

No Picture from one or all inputs (OSD and Sound OK)

<Symptom>
No Picture from one or all inputs (Sound OK)
<Models>
All models
<How to determine the defective board>
Is there no
No
picture from all
inputs?
Yes
Disconnect
No
CN A5, Turn the unit on.
Does a white picture
appears? (*)
Yes
A (1)or D (2) Board
A Board
No
SC board. Turn the unit on. Is
Panel discharge
occurs?
Yes
D Board
Disconnect
the SU Board from the
No
there a picture at the
lower half of the
screen?
Yes
SU Board
23
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
Note: Slow leakage from the
panel causes "no raster and
buzz noise"
Connect the
SU board. Disconnect
the SD Board from the SC board.
Turn the unit on. Is there a
picture at the upper half
of the screen?.
Yes
SD Board
SC or D Board
No
and possibly
Panel.