Lost two both with same conditions you describe.
First one was outside, it worked fine until the spring run up.
I bought a pro scan 32 inch ($149) , mounted it in the living area and moved the sheki outside.
Next spring I lost that one. Took that one apart and found the board corroded.
The last seiki went into my garage where it’s been working since.
I now have two smart ROKU’s. ($129 ea). And love them.
Another plus is the new ones have a QAM tuner that tunes to the digital cable system some campgrounds converted to.
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