On Wednesday, 28 October 2020 19:27:06 GMT Dale wrote: > I'm thinking about replacing that cap and seeing if it works. I've > repaired a few monitors that way but my question is, should I trust it > after replacing that cap even if it works?? Should it be load tested or > something? Does the protection circuitry only work once?
It depends what was damaged and the cause of it. It could be the capacitor reached its predicted end of life. It could have been a transient voltage, in which case more things in the protection circuit (diodes, resistors) may have also been damaged. I had an old desktop which during a lightning storm ended up with a blown PSU and a blown winmodem. The winmodem was unrepairable, but the PSU survived following the replacement of a single capacitor. :-) For the cost of a capacitor I'd give it a try and then measure the output voltages under load.
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