Welcome to Virt.Dr ees.

I would say it may be a difference in the read quality of your stereo's DVD player and the one on your PC. It could also be a dirty laser on the DVD player. Have you used one of the laser cleaner disks lately? And does it get more use than the one on your PC?

If you have a video card or add-on card that supports TV out on your computer,then yes,it will work. You may have to do some adjusting/tweaking on your PC to get the picture quality up however. Cable length up to(i've heard) 50 feet should work ok. Can't justify this personally, but mine runs about 25feet from my PC to TV with no problems..

hope this helped a' bit...