Hey, everyone--I've got a few questions for you, hopefully you can help me out. 
I got a bunch of free Pentium III motherboards that I can use, with, you guessed it--bad capacitors. However, I'm not too sure about the condition of all of the capacitors... it's odd. Some of them look bad, and some of them don't. I know that, as a precaution, if any cap looks bad, you ought to replace all of the capacitors of the same rating and voltage. So, I'm doing that, but there are capacitors of a different rating that look fine. That's where my problem comes in.
There are three types of capacitors on this board: 2200uF 10V, 1000uF 6.3V, and 100uF 16V. The only ones showing signs of damage seem to be the 1000uF 6.3V ones. They are the only ones that have bulging/leaking tops. Those capacitors are indiciated as red number 1's in the images below. I plan to replace those all, of course.
Now, since all of the capacitors are the original ones on the board, I'm wondering, do the 2200uF 10V (marked with blue number 2's on the image) and the 100uF 16V (yellow number 3's) capacitors need to be replaced, too? They don't seem to be showing any sign of damage.
However, the 2200uF 10V ones have got a thin layer of brown stuff on the side of them. It looks like dust, but you can't wipe it off with your finger. There is no bulging on these caps anywhere. I don't think it's the electrolytic fluid, though, because that's usually a much different shade of brown, and it only appears on the one side of the capacitors--the side next to the processor. That's what leads me to believe it's dust, because these motherboards were previously used, and so dust from the processor fan probably blew onto the caps next to the processor.
So, again, should I replace the 2200uF 10V and 100uF 16V capacitors as well, or just the 1000uF 10V ones?
Thanks for all of your help ahead of time.
-Steve
I got a bunch of free Pentium III motherboards that I can use, with, you guessed it--bad capacitors. However, I'm not too sure about the condition of all of the capacitors... it's odd. Some of them look bad, and some of them don't. I know that, as a precaution, if any cap looks bad, you ought to replace all of the capacitors of the same rating and voltage. So, I'm doing that, but there are capacitors of a different rating that look fine. That's where my problem comes in.
There are three types of capacitors on this board: 2200uF 10V, 1000uF 6.3V, and 100uF 16V. The only ones showing signs of damage seem to be the 1000uF 6.3V ones. They are the only ones that have bulging/leaking tops. Those capacitors are indiciated as red number 1's in the images below. I plan to replace those all, of course.
Now, since all of the capacitors are the original ones on the board, I'm wondering, do the 2200uF 10V (marked with blue number 2's on the image) and the 100uF 16V (yellow number 3's) capacitors need to be replaced, too? They don't seem to be showing any sign of damage.
However, the 2200uF 10V ones have got a thin layer of brown stuff on the side of them. It looks like dust, but you can't wipe it off with your finger. There is no bulging on these caps anywhere. I don't think it's the electrolytic fluid, though, because that's usually a much different shade of brown, and it only appears on the one side of the capacitors--the side next to the processor. That's what leads me to believe it's dust, because these motherboards were previously used, and so dust from the processor fan probably blew onto the caps next to the processor.
So, again, should I replace the 2200uF 10V and 100uF 16V capacitors as well, or just the 1000uF 10V ones?
Thanks for all of your help ahead of time.
-Steve
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