Posted 2020-01-25 12:13 AM (#1765 - in reply to #1764) Subject: Re: Bad Caps
Well, to answer my own question. It seems ok!
I could only find two caps, doh! However I traced them and they seem to be connected to each video out on the card. Maybe the 5v supply or something. Anyway, the best of the three appeared to go to the S-video, so I left that and changed the other two. They were the most domed and my theory is that they supply vga and dvi.
I've had the card resuming from a blank screen successfully, all evening. So fingers crossed!
Posted 2020-01-25 5:46 AM (#1766 - in reply to #1765) Subject: Re: Bad Caps
Location: Hull, UK
With capacitors you can generally go up in voltage, but never down. Personally I tend to only ever order 50V ones, because nothing in the things I repair should ever go that high and they'll last longer, you can even increase the capacity in some situations and get away with it - pretty certain I replaced 100µF 16V caps on my STB LightSpeed with 470µF 50v ones because they were all I had on hand and they're just filtering power, the little ceramic ones will be filtering all of the noise out, so using electrolytics larger than the original ones could arguably work better as they'll allow for a more stable supply of power. Ceramic ones or capacitors that are otherwise used in some resonant circuit (clock generators, probably) are more touchy though, the correct value must generally be used there as far as capacity goes, at least.
Posted 2020-01-26 3:03 PM (#1776 - in reply to #1769) Subject: Re: Bad Caps
One strange thing I noticed when replacing these caps.
The board was double drilled on the positive + leg. So fitting a physically larger cap was possible anyway. Maybe Leadtek cheaped out by using smaller caps for some reason? Maybe that's why they failed?