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From: The Natural Philosopher <tnp@invalid.invalid>
Newsgroups: comp.os.linux.misc
Subject: Re: Little Project - a 2-Level "Porch Light"
Date: Sun, 26 Jan 2025 13:42:32 +0000
Organization: A little, after lunch
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On 26/01/2025 13:21, Rich wrote:
> 186282@ud0s4.net <186283@ud0s4.net> wrote:
>> Alas this fixture is OLD - and has now trended towards "blinking" if
>> the temp goes below 50F.
> 
> Likely one bad capacitor on the board that loses its ability to store
> charge in low temps.  Given the 'blinking' it is most likely the
> bootstrap cap. which allows the main supply regulator chip to start up
> to power the "motion sensing" parts.
> 
I had a TV once that needed a good slap to get the colour working.

I opened it up and found they had used EYELETS to form vias.   None of 
them were soldered.

I soldered a few and the colour came half back, Then the penny dropped, 
and I soldered every single one on both sides of the boards.

The TV was flawless until it got a direct lightning strike.

It's the same with electrolytics of a certain age, and RIFA mains filter 
caps. Justreplace the fucking lot.

Probably that fixes about half of all 'dead' electronics these days




-- 
Religion is regarded by the common people as true, by the wise as 
foolish, and by the rulers as useful.

(Seneca the Younger, 65 AD)