Television and Home Theater

What is up with this thing? Been working fine, and then this morning, the remote will not work. No, it's not the batteries! Have tried using two different remotes that I know are good, and still nothing. Any suggestions?
Thanks
C King

I have a Mitsubishi 50" Model# VS -50VA2,It was bought in 1993 and has performed well over the years.Back in 2001 ,after the TV has been on the picture dissapears but there is still sound,sometimes the picture would come back other times if you turned the TV off for 30 minutes and turned the TV on there would be a picture.I had a TECH come to the house and it was determined that the TV needed a PIP MODULE.Well the bill was over 200.00 but it was fixed.Well,not so fast.About a year ago the picture sometimes would turn off but you still had sound.Sometimes the picture would turn back on

Both the red and blue lenses can be adjusted to bring the entire screen into proper convergence, but it won't stay that way. Within an hour (sometimes less), or sometimes when I first turn it on, the convergence is off again.

The improper convergence is also not linear, but curved. This makes it extremely difficult and time-consuming to get it set back correctly. I'm pretty much resigned to calling a repair man, but would like advice on what the possible problem might be and a cost estimate. The set is nine years old and I don't want to throw money away.