Samsung 32 LE32B450C4WXXU changes source on its own

[Cornboats]

Samsung 32 LE32B450C4WXXU, manufactured 2009

This set changes source without being asked. Turn the set on and tv channel comes on for up to 20mins then set changes to ext1 for a couple of secs then PC for a couple of secs then back to tv for the same same. Then the cycle starts again. I turned on today and there were no channels saved so I had to rescan.
I'm guessing the faults on the main board so have included a photo.
Any thoughts or ideas would be welcome.

[nomoresonys]

Re: Samsung 32 changes source on its own

is the input button on the tv sticking? maybe try unhook the button board and see what you get just using the remote if possible.

[diif]

Re: Samsung 32 changes source on its own

Tired worn output caps on the power supply maybe not filtering as they should causing issues perhaps.

[Cornboats]

Re: Samsung 32 changes source on its own

Thanks for both of your suggestions. I'll look at both areas and report back asap.