[limacharliewhiskey]

Dugpa's advice is pretty much what I was gonna say. If the Sony player is commonly glitching on several discs, it's generally the fault of the player, where sometimes a certain player may have incompatibilities with discs from certain studios.

Some older Sony players have a diagnostic menu that you can run to recalibrate the alignment of the laser. I don't know if your DVD/VHS combo unit has the same service menu to do any such maintenance.

Glitchy discs are pretty rare, as you shouldn't run across these in more than 2% or 3% of the discs you play. If it's more than that, it's the player that needs to be replaced.

The way to determine if the disc is faulty is if the same problem occurs on multiple players. If you get the same glitch at the same exact spot on 3 different players, the disc is faulty.