Samsung LS23PTNSF/ZA- Erratic behavior 20 minutes after turn on

[valvashon]

This smaller Samsung TV will turn on fine and work fine at first. By this I mean that it will respond properly to the remote commands with channel up and down working and volume up and down working, etc.
After the set has been on for a while- 20 to 30 minutes- it stops responding or responds erratically to commands from the remote or the front panel buttons. Remote is fine, works well with other TV's.
My guess is caps in the power supply warming up and changing value leading to the erratic behavior. TV does not act erratically unless you try to change a channel or something like that- it will display the selected channel all day long if you want.
Turning it off and back on seems to cure the problem. Caps in the power supply don't look popped. I have not pulled or tested them yet. Was just going to shotgun the caps unless that wouldn't be the issue.

Thanks

Val

[valvashon]

Re: Samsung LS23PTNSF/ZA- Erratic behavior 20 minutes after turn on

For what it's worth, I did shotgun all the caps in this power supply and the TV is now working for extended periods of time without any erratic behavior. I did test the caps once they were out but all were OK cold. I didn't measure the voltages (before replacing the caps) when the set was cold and when it was warmed up. I suppose I should have but with only a meter I wouldn't have seen what was probably some AC ripple and I don't have easy access to a scope.