while useing my pc the channel changes to auto fm mono and i have to press pc button to get it back keeps happening nivida card monitor technosonic.
I've been looking for a manual for your monitor, but have been unable to locate one. If you have one, I suggest that you read through it and see what it says about the monitor configuration for various source inputs, and the relative priority thereof. Depending on how it's configured, some sources will have a higher priority than others, and if a signal is received on such a source then the monitor will switch to that source (even if it's only a temporary switch). I'm only surmising though, I just wish I was able to locate a manual so that I could help you further. 