Leaked Capacitors
- Thread starter Crissyfox
- Start date
Jollyriffic
Posts: 52 +24
Unless theres something else causing the issues, 100%
D
DelJo63
"cap's that leaked most of their electrolyte" -- these are usually associated with POWER, not ports.
Jollyriffic
Posts: 52 +24
Caps are used to keep from having a power spike and give fluid power.
if a usb port is shorted or the cap isn't letting power flow, then the usb port will not power the device and/or could trip the protection circuit.
if a usb port is shorted or the cap isn't letting power flow, then the usb port will not power the device and/or could trip the protection circuit.
D
DelJo63
@Jollyriffic I've been building shortwave radio since '60s 
The problem is the MF values and the circuitry - - what they are connected to.
The problem is the MF values and the circuitry - - what they are connected to.If you thoroughly remove the leaked electrolyte with isopropyl alcohol and a tooth brush and replace all leaking and bulging capacitors, I think you should be fine. Just make sure that all the leaked electrolyte is removed as you otherwise may end up shorting across several PCB traces cause problems elsewhere. While electrolyte is corrosive, I haven't actually seen it eating away older PCBs, even with some of my very old breadbox C64s that started having this problem.
Did they burst at the top or the bottom? cleaning off the busted caps isn't going to do anything for you I'm afraid. You'll have to un-solder (is that a word?) the damaged caps from the motherboard, including the bulging ones. Then take your isopropyl alcohol and properly scrub the affected area, make sure to also check the underside of the main board. Once its clean, check very carefully for corrosion signs, if there are none you should be pretty good. Solder on the new caps and keep you fingers crossed. (My soldering skills aren't the greatest so superstition quickly becomes a factor.)
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DelJo63
USB provides 5.0 v @ 500ma to every device. If these are USB related, then
- there will be ONE for every USB slot on the system
- the caps should be at least 7.5 V, 10 MF; better design would be 10v
Jollyriffic
Posts: 52 +24
You don't need a cap per, the supply voltage could be done with a single cap to all ports or they could be split.
at least that's how I've done mine
OP
Crissyfox
Posts: 69 +22
- Thread Starter
- #12
its desolder, and they popped at the top where theres a pressure release groove cut into the top. the computer hasnt been used in a couple of months and the electrolyte solution was dry and crusty, so I cleaned it off with rubbing alcohol, I just didnt have the time then to replace them I'll look up the numbers and order a couple of new caps off the fleabay.
cliffordcooley
Posts: 13,141 +6,442
lol - I like it - wish they had used that name instead.
MaikuTech
Posts: 1,128 +191
Make sure the capacitors are the right ones for your mobo and of good quality.
Last thing you want is to come one day and find the mobo dead.
Call the manufacturer of your mobo and ask them which ones you will need and how to insert them.
cliffordcooley
Posts: 13,141 +6,442
As long as you get quality components of the same specifications, the product they go in is of no importance.
MaikuTech
Posts: 1,128 +191
O_o can I sway you in the direction of a newer mobo and cpu ?
Anyway jokes aside for the moment, use rubycon or good solid capacitors.
https://www.digikey.com/products/en...,fff40002,fff80009&ColumnSort=-1000011&page=1
Please listen to me and read what ty_ger has to say here, I don't know how messed the capacitors are.
https://forums.evga.com/EVGA-nForce-680i-SLI-capacitors-m2463033.aspx
This picture is from neowin if your capacitors did something like this in your computer.
https://cdn.neow.in/forum/uploads/monthly_08_2012/post-37120-0-88687100-1346451202.jpg
https://www.neowin.net/forum/topic/1102467-bad-capacitors-how-to-spot-them/
Replace them all to make sure the mobo will bootup no probs, or make plans and a buy a new mobo/cpu.
To replace the capacitors you need to source exact replacements, own a suitable soldering iron as well as having a reasonable level of proficiency. Apart from the capacitors that have failed there may be others on the board of the same type that will fail shortly after a successful repair. That's what happened to me when I replaced a couple of blown motherboard capacitors. I'd forget a DIY job.
I ordered a used replacement board for my wife's computer and found a couple of leaking Caps on it. I decided to replace them and even though I have good soldering skills (CB radios back in the 80's) I ended up having to buy a 40 watt iron because my 25 watt is not enough on a double-sided board. You have to get the solder to flow to both sides. Used my solder-pullet to get the old ones out with out damaging the traces.
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