Philips DVP3111 Service Manual page 16

No video picture, no sound.
No video picture,
Check
voltages from the power
board to the decoder board
are normal.
Check if the reset circuit consisting
of C13, Q4, Q3,R11,R12,R13,R15,R16 is normal
(at a high level for tens of milliseconds,
then constantly at 0V).
Check whether there is
27MHz signal output.
Check if there is 128MHz
signal output on R49.
5-8
no sound.
Go
whether all the
Yes
Yes
Yes
SDRAM(R49 SDCLK) waveform
Yes
Check U3.
No
Check the loaded circuit
CVBS(L27 point) waveform
No
Change C13,Q4,Q3
Crystal oscillator Y1 and
No
peripheral components
are defected or eroded.
Check whether
No
short-circuit or bad
solder on U3, U4
Yes
Reconnect the component in
short-circuit
Trouble shooting chart
27M waveform
No