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Start Up Fails When HDD Connected

We explained at the time it was not a good idea to replace a 4.7uf electrolytic capacitor that is 25v on this machine. The original is rated at 35V 4.7uf and a smd Capacitor. You agreed for us to put our part on. You should not change a smd capacitor for a through hole version. You should replace like for like. You can put a higher voltage on it but not lower. Capacitance should be the same, not lower or within 10% higher...
As a general rule yes, but not when you know the circuit parameters. 35V is unnecessary in this case, even 25V is overkill.

SMD: nice if you can get one, but if you can't you have to make do with what you can get – ie a radial leaded. It is also difficult to fit SMD components without specialist tools.

Nobody here suggested you take it to a repair shop – if you had mentioned it I would have told you not to waste your time and money (or theirs). It would either be very expensive, or bodged as a favour. Replacing with a second-hand HDR-FOX is the most viable option, and replacing the capacitor is last-ditch for when there is nothing to lose. Without further detailed testing there was no certainty that replacing the capacitor would cure the problem (it might not even have been the same problem).

It is not correct there were no schematics, there are sketches of the circuit topology in this area up-thread. But nonetheless, I'm quite sure the repair shop offered you no guarantees, and made their best effort based on the limited information you provided. They would not want to be spending time reading lengthy forum posts, nor engaging with the discussion. We could have advised, but it's unreasonable to expect.

Basically they're saying they did what you asked them to do and washing their hands of it, and I don't blame them one iota. You were being naïve by complaining, and particularly naïve griping in this thread when you know they've seen it.

We are enthusiasts, you are a consumer. Enthusiasts go to lengths inappropriate for a consumer, even inconvenience. As a consumer, a PVR is an off-the-shelf item: you buy one, you use it until it breaks, becomes obsolete, or you decide to get another one.
 
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