Any advice?

I have had my RCA model 27V520T for a few years now.  My problem is now the remote has stopped working as have the front panel buttons. The front panel buttons do not control the features they say they control, i.e. the channel up now powers the tv on, volume is the menu... TV will turn on and off at random and it is driving me CRAZY!!! When I am able to get the tv on, it starts a channel search, but the tv won't stay on long enough to go through the search. Then, on and off, on and off. Any help is appreciated!!!!