RCA CTC 187 is changing channels by itself.

[kx250rider]

Try plugging it in, turning it on, then turn it off while it's scanning, then back on again... That should stop the scan, and you should be able to get the menu up. If not, you might have a mechanical problem, such as a banged-in button switch on the front of the PC board. Any of the buttons stuck "PUSHED" will jam the buss, and and none of the other buttons will work. But again, those RCAs scan for channels automatically on plug-in & first power-on, and it will scan til the cows come home if there aren't any analog channels to pick up.

Charles