Philips DVP3126 Service Manual page 12

The power can not be on or off
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The power can't be
on or off
Go
Check the power supply
on the power board is
normal.
Yes
Check if the CON301 on
the front board to CN5 on
Yes
the decoder board is in
good contact.
Yes
Whether the connection
to K301 is broken.
Yes
Whether there is 0V and
3.3V voltage difference on
Pin 94 PCON of U1.
Yes
4-2
No
Repair the power board
No
Check/Correct connection
No
Correct the connection
No
Replace U1.
Trouble shooting chart