Sony Trinitron keeps changing channels.?

The TV isn't new but it isn't old either Maybe 8-10 years. (its a nice model also, silver in color, and 36 inches, one of the last "tube" televisions the company produced) The channel changes at random times. Most of the time it is on one channel, but it will switch every now and then. The remote will not work, even with new batteries, don't get me wrong it "works" but the TV doesn't respond to it . Also the buttons on the TV itself do not work as they should. To ajust volume, you need to hold it down. If you just tap it, it changes the channel, same with all the other buttons, like menu, ok, tv/video, and exit...all just change it, except for the channel buttons, which don't work at all. I have unplugged and re-plugged....still nothing. Is there anything I can do to fix this problem the doesn't involve TV repairman or new tv?????