I bought a device from an electronic distributer that is for watching prerecorded dvds and vhs tapes that have a problem with the sync and agc for some reason. It works VERY well in fact one time I forgot to unhook it when I was making a backup copy of a tape for my own use and the copy looked fine. Here is the best Part, it cost $20.00 and will run for about 6 months on a 9 volt battery if you leave it on 24/7. If anybody wants to know where I bought it please pm me and I will look up the stock number and phone # of the distributer
Richard