Keeps switching inputs - Mitsubishi WD-82837 82 in. HDTV DLP TV

If your HDMI input keeps changing. Do this procedure, First check the input button on the back of tv if it is stuck up. If not , check the input button of the remote if it is stuck. If both are not stock up. You main board need to be reset. Go to main menu and reset. If still the same issue. You main board controller need to be replace. The software is corrupted.

The normal cause of this problem is a conducting switch (usually the one whichever function it is doing) or conduction under the switch. Either way, if you can solder, the problem can be corrected by simply resoldering all the solder connections for the switches (2 for each switch). If you cannot solder, take it to a repair center.

I had the same problem. It has nothing to do with power supply board. Its the switch assembly board on the side of the set. Once I disconnected the board everything was fine including the remote fuctions.

It sounds like you aren't cycling fully.
It sounds like you are on the TV (RF/Cable) input, then you switch input to Component 1 (for your DVD) and watch the DVD, then hit the input selector again, switching it to Component 2...you need to keep switching the input until you are back on the TV / Cable input.

Must check by replacing "Input / source selector switch". Gets leaky by rusting sometimes.

Sounds as if your telly is switched out to Computer Input screen, that is a message to tell you that it does not detect your computer. You need to switch it back to TV

Are you using the correct input setting for the device...HDMI, Cable etc etc.....it might be looking for the incorrect input

Press the input button and the set will turn on. Keep pressing the input button until the correct input is selected.

You need a live input source to the port that the TV is set to, or turn on the tv and switch input to a live input source, anything else and the tv shifts to standby.