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No video picture, no sound.
Check the cable if that is used to
connect TV and DVD Player, is
normal
Check whether all the voltages
from the power board to the
decoder board are normal.
Check if the reset circuit consisting
ofC58 normal (at a low level for tens
of milliseconds, then constantly at
3.3V).
Check if there is 27MHz
signal output in
Check if the component of
vidio
Check U1 and Replace U1
No video picture,
no sound.
Yes
Yes
Yes
Yes
output circuit.
Yes
4-10
No
Replace the cable
No
Check the power board
No
Change C58,R125,U1
Crystal oscillator X3 and
No
peripheral components
are defected or eroded.
No
Change the bad component
Trouble shooting chart
Free Datasheet http://www.datasheet4u.net/
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