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re-capping a motherboard
RandyT:
It could also be that the caps aren't of the quality necessary for use on a motherboard. You didn't really say whether you got the good, Japanese capacitors meant for the job. If you didn't, make sure you do next time :). I did, and my re-capped motherboard has been going strong for over year (even though the voltage seems a tiny bit higher than it should be, but it's still in spec.)
RandyT
ubiquityman:
--- Quote from: lilshawn on March 22, 2010, 05:48:08 pm ---anybody know why a motherboard i re-capped 2 months ago would be bulging caps again? it had a couple up next the the CPU that where bulged so i replaced them and now they are popped again. :angry:
power supply looks good.
--- End quote ---
I've re-capped several motherboards and power supplies and have not had a problem thus far.
Tell us what the original caps were and then tell us what you replaced them with.
If you don't know what the original caps were, tell us the motherboard model number.
For starters, I'd like to ensure you purchased the correct replacement caps before heading down further troubleshooting.
lilshawn:
it's actually a motherboard out of a Big Buck Hunter Pro computer, it wasn't posting... brought it back to the shop and replaced all the caps (even ones without pregnant tops on them.) now it's about 2 months later and it's doing it again. (again not posting again pregnant caps)
EDIT: it's not the red "biostar" board it is a replacement green series board. unsure of manufacturer...
I'm unsure of the manufacturer of the caps, i picked them up at our local electronics supplier...they are an oddball size (2200uf 16 volt) where on most boards, the CPU caps are 1000 6.3 volt. Iv'e done several others with no (ha) problems. nothing like this anyways. Due to the area in which the caps a crammed in, i did not up-cap them i left them the same rating and voltage.
i'm leaning towards receiving a regular ESR cap as opposed to the low ESR type. They where the narrow skinny type that are normally found crammed on motherboards, so i'm not sure. I would think not, but you never know.......
is there a marking or identification on the cap that would let me know if it was low ESR or not?
@fatfingers, yes and no, the difference being that a transistor when being switched on has a range where in between it's "kind of" on but not quite on yet...current begins to flow through at a reduced rate, a MOSFET is super narrow...where the difference of a few tenths of a volt can potentially turn it from off to on....wikipedia has a good animated GIF on the MOSFET page that demonstrates this quite well.
you will notice that the "connection" doesn't actually form inside this FET until about .45 volts... and is established by .5 volts
northerngames:
are you overclocked any?
I recently took my 4000+ to 2.7gig and I was reading that if you crank your cpu, ram, voltage up to much it is possible it will start popping caps also and why alot of overclockers go with the jap cap's as mentioned prior above already becuase they can handle it where most other's cannot.
check in your bios and see what your feeding the ram and cpu voltage wise.
also if you have a power hungry video card and cpu but a crappy psu that can cause alot of stress, freezing, slow down, heat issue's etc. also.
lilshawn:
No, no overclocking. Big buck hunter isn't huge on system resources. The only reason I think the computer is as fast as it is, is because they don't make anything slower.
well tomorrow ill pull the caps and see what the deal is... I'm on a 4 hour drive to go fix some stuff out of town.