Philips DVP6600 Service Manual page 19

No display on LED, and buttons do not work
No display on LEDD,
and buttons do not work
Check whether there is
correct contact between J2
and J6
checkVCC(+5v)
on the power and front
board
Check
signals on J2 and J6on the
front board.
Replace U2 or LED
Yes
Yes
voltage
Yes
there are DATA
Yes
4-6
No
Correct connection
Fix power supply board top
No
a power supply for should
electric circuit
No
Check
98,99,100,200,,R204,R206
Trouble shooting chart
the U4's pin
arrive