I have a sanyo 25" mod.DS25390 it jumps back and forth from channel to channel no matter which channel you choose.is this afforadbly repaired,or should I trash it,and go buy a new one?

Do you have a nearby place that will give free estimates? It sounds like the tuner is toast.

Does this happen when remote is covered? Could be the up or down button stuck on TV.
Does it just go up, just go down, or random?