With Sound But No Picture - Sanyo PDP-42XS1 Service Manual

2.With sound but no picture:

Check if all other channel
has no picture.
No
Check N201
and periphery
circuit
With sound but no picture.
Display logo?
Yes
Check if the X301
have the signal wave.
Yes
Turn to check 4
of program
Abnormal
Check the input signal of N301
and N302 and power supply.
Normal
N301 and N302
damaged.
No
Unfix X901, X902 and X301, set
Normal
SW501 of the power supply board
as AUTO, use to itself source
signal, and check if turn on the
unit is normal
Normal
Abnormal
Check N201 and the circuit
of output.
22
Abnormal
The screen damaged.