RCA MM36110 TV Monitor

I have an RCA MM36110 TV Monitor I have had for some time, but hasn't received a lot of use. After a recent thunderstorm and resulting power outage, it could only receive channel 1. When you do a channel scan, the new channel number is displayed but the channel won't change. I have tried removing power in the event it was a micro lock up problem, but the problem still exists. Any ideas on how fixable the problem is before I decide to trash the set? It is a good TV and will display HDTV when used with an external decoder.