Philips DVP5980 Service Manual page 21

No video picture, no sound.
No video picture,
Check whether all the voltages
from the power board to the
decoder board are normal.
Check
consisting of CE2, Q5 and D1
is normal (at a high level for
tens of
constantly at 0V).
Check whether there is
27MHz signal output.
Check if there is 128MHz
signal output from R110.
Check if short-circuit and bad
solder exist on Pin Y3
Reconnect the component in
short-circuit
no sound.
Go
Yes
if the reset circuit
milliseconds, then
Yes
Yes
SDRAM(R110 SDCLK) waveform
Yes
Yes
4-10
No
Check the loaded circuit
No
Change CE2, and Q5.
Crystal oscillator Y1 and
No
peripheral components
are defected or eroded.
Check whether
No
short-circuit or bad
solder on U8
No
T rouble shooting chart
CVBS(R85 point) waveform
27M waveform
No
Yes
Check U5.