bulging caps and how to fix 'em

[helmut]

hello all, just wondering about this..someone gave me a box with
ahtlon1900,768m ram and so on..They said it was very unreliable..random
reboot..bsod . I suspected bad caps and sure enough a fair few were bulging
on the mobo..I've read on the net about replacing caps and how fiddly it
is..having to get the solder out of the holes etc. but just for the hell of
it i yanked one of the caps out with pliers and saw that the 2 1egs were
left in the mobo..if i just soldered a new cap to these legs would it
work?..

 

[Rod Speed]

hello all, just wondering about this..someone gave me a box with ahtlon1900,768m ram and so
on..They said it was very
unreliable..random reboot..bsod . I suspected bad caps and sure
enough a fair few were bulging on the mobo..I've read on the net
about replacing caps and how fiddly it is..having to get the solder
out of the holes etc. but just for the hell of it i yanked one of the
caps out with pliers and saw that the 2 1egs were left in the mobo..

Fark, wota butcher.

if i just soldered a new cap to these legs would it work?..

Probably.

 

[Conor]

hello all, just wondering about this..someone gave me a box with
ahtlon1900,768m ram and so on..They said it was very unreliable..random
reboot..bsod . I suspected bad caps and sure enough a fair few were bulging
on the mobo..I've read on the net about replacing caps and how fiddly it
is..having to get the solder out of the holes etc. but just for the hell of
it i yanked one of the caps out with pliers and saw that the 2 1egs were
left in the mobo..if i just soldered a new cap to these legs would it
work?..

Yes. If there's not a lot of room around the CPU though, get sdome
veroboard, soder the CAPS in that and make some flyleads up from the
veroboard to the old CAP pins.

 

[Kent_Diego]

hello all, just wondering about this..someone gave me a box with

ahtlon1900,768m ram and so on..They said it was very unreliable..random
reboot..bsod . I suspected bad caps and sure enough a fair few were
bulging on the mobo..I've read on the net about replacing caps and how
fiddly it is..having to get the solder out of the holes etc. but just for
the hell of it i yanked one of the caps out with pliers and saw that the 2
1egs were left in the mobo..if i just soldered a new cap to these legs
would it work?..

If you could. Yes it would work. The real way it to use solder wick braid
and a solder sucker to clear everything out of the holes. I have done this
before. It is not easy and takes a long time. Using two soldering irons, one
top and one bottom helps.

 

[helmut]

If you could. Yes it would work. The real way it to use solder wick braid
and a solder sucker to clear everything out of the holes. I have done this
before. It is not easy and takes a long time. Using two soldering irons,
one top and one bottom helps.

hmm, i'm a clumsy solderer..theres crap going everywhere.
how about if you could somehow crimp them together..I'm thinking small
crimps crunched with long nose pliers,would crimped joints be satisfactory
as far as reliability is concerned..

 

[JAD]

hmm, i'm a clumsy solderer..theres crap going everywhere.
how about if you could somehow crimp them together..I'm thinking small
crimps crunched with long nose pliers,would crimped joints be satisfactory
as far as reliability is concerned..

no,,, if your just doing this to 'practice', then carry on, otherwise take
it to somebody or dump the board.

 

[RussellS]

no,,, if your just doing this to 'practice', then carry on, otherwise take
it to somebody or dump the board.

Probably best to just find a compatible replacement board for far less
headaches and labor...unless, as mentioned, you'd just like to try it out
for learning purposes. You should solder.

 

[helmut]

Probably best to just find a compatible replacement board for far less
headaches and labor...unless, as mentioned, you'd just like to try it out
for learning purposes. You should solder.

heh..guess i'd better leave it to the experts.

 

[Sylvain VAN DER WALDE]

hmm, i'm a clumsy solderer..theres crap going everywhere.
how about if you could somehow crimp them together..I'm thinking small
crimps crunched with long nose pliers,would crimped joints be satisfactory
as far as reliability is concerned..

If they are _proper_ crimps, of the correct size, they should be alright.
Crimps are widely used, and "wrap around" non-solder connections (using
square posts) were used in UK TV sets reliably.

Sylvain.

 

[spaz]

If you could. Yes it would work. The real way it to use solder wick braid
and a solder sucker to clear everything out of the holes. I have done this
before. It is not easy and takes a long time. Using two soldering irons, one
top and one bottom helps.

Often if there's room, it's easy to clip the component leads leaving
the wire ends soldered in the circuit board. It's then easy to melt
the solder and suck the solder and wire up with a solder sucker
device. This will usually clean out the hole also.

On stubborn holes, using solder wick you can clip the solder wick
end on a diagonal to form a pointed tip of braid. Stick the point
into the hole and proceed as usual to wick up the solder.

Don't rip anything that doesn't want to just slide out. You'll
probably damage the thru hole plating and that can cause problems
with connections to interior PC layers. Probably not a big deal
with those caps.