So Samsung says the “rebooting” of some of their TVs is due to the TV detecting problem and attempting to fix it by rebooting.
My 2010 Plasma started rebooting so often, I was afraid to try to update the software. In my situation there was no dust in the TV to speak of and all the capacitors looked fine. Software/firmware finally got updated to the latest.
Another comment on another site said they checked all the ribbon connectors. Once the back panel was off, of the dozen or more ribbons, I found maybe two that were a bit loose and pushed them back in.
Then I remembered what happened. Earlier that day I had the volume up to the max for the first time ever because there was so much noise outside from construction I could not hear the TV.
The loudspeakers must have vibrated some connectors loose.
Okums razor. I wonder how many people spent money only due to a loose connector.
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