I have a Sharp DV740U DVD player (SAMPO DVE611 clone) that had been giving me grief ever since I bought it. I should have returned it but I hung on to it. At the time, I did some googling & found that the apparent problem was overheating, so I cut down an old socket 7 CPU heatsink to 1" x 1" & glued it to the offending chip. I also cut a hole in the rear of the unit & installed an old CPU fan to help exhaust the warm air from the case. The fan had a 4-pin molex & all I had to do was daisy chain it to the DVD unit. That seemed to help for a while but eventually it started skipping & locking up again, so I bought a new player.

Anyhow, I was cleaning up the other day I decided to experiment with it one last time before finally kicking it to the curb. When I plugged it in, it went into a constant on-off loop & I wasn't able to accomplish anything. Bad power supply maybe?

Any suggestions or should I just sh!tcan it & move on?

Thanks.

"And that's the fishing line, because Sharkboy said so!"

(edit) Dumb post by me. Please ignore.

Normal glue may not conduct heat to the heatsink. This way you most probably ended up keeping the all-present air off the chip, making matters worse. You must have used thermal paste, instead, provided that there is conducting metal surface placed on the chip.

Regards

SuatCINI

Just to clarify - I put a thin layer of thermal paste on the chip but stayed away from the 4 corners. Then I put a small dab of superglue in each corner, set the heatsink on the chip & put pressure on it until the glue set up.

"And that's the fishing line, because Sharkboy said so!"

Maybe bad capacitors ? any bulging and/or leaking capacitors ? Of course, you may not be able to see all capacitors.

Maybe dust and moisture, combined, may develop short circuits between the tiny legs of chips ?

Have you gently cleaned the surfaces of the electronic boards within reach with a soft toothbrush ?

Regards

SuatCINI