Won't play disc, says there is "no valid disc" no matter what dvd is put in

you most likely have either a dirty or a BAD optical pickup in the DVD player.

Simply change the ROM to DVD RW drive since this is an old PC and now days nobody uses a dvd rom but a dvd writer. It will be worth it since it can do all the functions and is also more hardy........sodeep

Since CDs play, this is usually a sign that the optics are failing. Try cleaning the lens using a cotton swab and alcohol. If that fails to resolve the problem, the optics will need to be replaced. If you can post the make and model, I can get you the approximate cost for this as well.

Thanks,
Dan

Try cleaning the lens with a dab of rubbing alchohol and a q-tip. If error continues, throw unit in garbage.

try to clean the lens using cd cleaner or cotton buds with drop of water on it. that really works.

Try cleaning the laser lens if this don't repair it ,is the flat cable connector between the laser lens and the main board.Good luck

I was told that they could reset it but I can not find a number on this company

Same here!!! We've only used it maybe 8 or 9 times. And it's been worthless for the past month because of it. It reads everything "no valid disk" and nothing will work. And I tried e-mailing customer support several times, with no luck.

Hi, Try cleaning the lens. A CD cleaner for PC CD/DVD will also work with DVD players. If problem is not corrected, you may need to seek the services of a qualified professional. Good luck and kind regards.

Try this out; Go to your DVD player's settings/setup menu, find the "Disc Lock", set it to "off" if it is already set to "on"