Sylvania Dvd Vcr Sylvania Dvd/vcr Combo Won't Play All Vhs Tapes?

Sylvania dvd/vcr combo won't play all vhs tapes? - sylvania dvd vcr

I bought a new Sylvania DVD / VCR Combo drive. I have my new c1310b Prima. During the playback of DVDs. Some nice piece of VHS. VHS Others do not play more than one seconds before returning to a blue screen AV. However, if another device is connected to television, VHS plays well? HELP!