Velocity Reviews - Computer Hardware Reviews

Velocity Reviews > Newsgroups > Computing > NZ Computing > Bad capacitor replacement?

Reply
Thread Tools

Bad capacitor replacement?

 
 
~misfit~
Guest
Posts: n/a
 
      11-27-2003
I have a mobo here that has bad caps. Of the 25 or so large ones ten are
domed or bulging. The PC spontaneously re-boots after 30 seconds or so.
(Tried with three different PSUs).

I haven't attempted doing anything like replacing caps on a mobo before, I
may be capable of it but would hate to risk the board. I'm in South
Auckland, does anyone know of an outfit or person who could provide this
service and any idea what it would cost? Or should I just attempt it myself?
(And where would be the best place for a novice to get the caps at the right
price?)

It's not really a throw-away board, it's an Abit BX133 RAID, set up to run a
Tualatin CPU. (Upgradeware 370 adapter). I'm unable to get the CPU/adapter
to run in any of the other boards I have here at the moment so would like to
explore the option of getting the caps replaced in this board.

As usual, all input gratefully recieved.

Regards,
--
~misfit~


 
Reply With Quote
 
 
 
 
Uncle StoatWarbler
Guest
Posts: n/a
 
      11-27-2003
On Fri, 28 Nov 2003 03:05:36 +1300, ~misfit~ wrote:

> I haven't attempted doing anything like replacing caps on a mobo before,
> I may be capable of it but would hate to risk the board.


The boards are 4 layers. DO NOT attempt to rework them without a
professional desoldering station fitted with vaccum pump (Pace, etc)

Using a solder sucker or solder wick will not usually free the legs up
completely and then there _will_ be damage to the through-hole plating as
the caps are removed, possibly resulting in the plating breaking away from
the board layer it's attached to.

You _may_ get lucky if you don't use the right tools, but then you may end
up with a paperweight too. The decision is yours.


 
Reply With Quote
 
 
 
 
The Flash
Guest
Posts: n/a
 
      11-27-2003
I would be willing to remove, test and refit or replace any bad capacitors,
email me at http://www.velocityreviews.com/forums/(E-Mail Removed)


"~misfit~" <~misfit~@his_desk.com> wrote in message
newsunxb.11612$(E-Mail Removed)...
> I have a mobo here that has bad caps. Of the 25 or so large ones ten are
> domed or bulging. The PC spontaneously re-boots after 30 seconds or so.
> (Tried with three different PSUs).
>
> I haven't attempted doing anything like replacing caps on a mobo before, I
> may be capable of it but would hate to risk the board. I'm in South
> Auckland, does anyone know of an outfit or person who could provide this
> service and any idea what it would cost? Or should I just attempt it

myself?
> (And where would be the best place for a novice to get the caps at the

right
> price?)
>
> It's not really a throw-away board, it's an Abit BX133 RAID, set up to run

a
> Tualatin CPU. (Upgradeware 370 adapter). I'm unable to get the CPU/adapter
> to run in any of the other boards I have here at the moment so would like

to
> explore the option of getting the caps replaced in this board.
>
> As usual, all input gratefully recieved.
>
> Regards,
> --
> ~misfit~
>
>



 
Reply With Quote
 
Uncle StoatWarbler
Guest
Posts: n/a
 
      11-27-2003
On Fri, 28 Nov 2003 04:52:26 +1300, The Flash wrote:

> I would be willing to remove, test and refit or replace any bad
> capacitors,


Huh?

If they're builging, they're ****ed.

If any one brand of caps is bulging, the rest of the caps in the board of
the same brand are suspect and should be replaced on spec.

I've been down this road with the original leaking capacitor problem 20
years ago(*). Replacing only the ones which seem bad results in repeated
service calls.

Change the lot and be done with it. The extra labour cost of _one_ repeat
to change more caps out will outweigh the extra costs of doing them all at
once.


(*) Black plastic bodied Japanese caps(**) fitted by the thousand into AWA
landmobile equipment (base stations and car kit). I reworked at least 200
model 2280 receivers because of these buggers and some of them came from
places which cost 2 hours of $1000/hour helicopter time to get at.

(**) Can't remember the brand. They were fully sealed and would literally
crack open, dumping their guts all over the surrounding area.


There are a number of brands mentioned on the net in conjunction with this
latest round of problems, all of whom bought their electrolyte from the
same pirate. I've encountered other unmentioned brands too - and boards
wtih bulgy caps dating from as far back as 1998, not the claimed March
2000 onset of the issue....

Check your PSUs too, if they're of that era. Quite a few have burned up or
failed.


 
Reply With Quote
 
Bret
Guest
Posts: n/a
 
      11-27-2003
On Thu, 27 Nov 2003 19:07:03 +0100, "Uncle StoatWarbler"
<(E-Mail Removed)> wrote:

>Check your PSUs too, if they're of that era. Quite a few have burned up or
>failed.


I have a '99 hyena from a customer with the brown goo leaking out the
top.
 
Reply With Quote
 
Gregory Parker
Guest
Posts: n/a
 
      11-27-2003
On Fri, 28 Nov 2003 03:05:36 +1300, "~misfit~" <~misfit~@his_desk.com> wrote:

>I have a mobo here that has bad caps. Of the 25 or so large ones ten are
>domed or bulging. The PC spontaneously re-boots after 30 seconds or so.
>(Tried with three different PSUs).
>
>I haven't attempted doing anything like replacing caps on a mobo before, I
>may be capable of it but would hate to risk the board. I'm in South
>Auckland, does anyone know of an outfit or person who could provide this
>service and any idea what it would cost? Or should I just attempt it myself?
>(And where would be the best place for a novice to get the caps at the right
>price?)
>
>It's not really a throw-away board, it's an Abit BX133 RAID, set up to run a
>Tualatin CPU. (Upgradeware 370 adapter). I'm unable to get the CPU/adapter
>to run in any of the other boards I have here at the moment so would like to
>explore the option of getting the caps replaced in this board.
>
>As usual, all input gratefully recieved.
>
>Regards,




Take it back Abit fitted these Bad Caps, complely covered by the C.G.A..


DO NOT TRY AND REPAIR IT, PLUS ITS HARD TO GET THE CORRECT CAPS..


 
Reply With Quote
 
Mainlander
Guest
Posts: n/a
 
      11-27-2003
In article <Punxb.11612$(E-Mail Removed)>,
~misfit~@his_desk.com says...
> I have a mobo here that has bad caps. Of the 25 or so large ones ten are
> domed or bulging. The PC spontaneously re-boots after 30 seconds or so.
> (Tried with three different PSUs).
>
> I haven't attempted doing anything like replacing caps on a mobo before, I
> may be capable of it but would hate to risk the board. I'm in South
> Auckland, does anyone know of an outfit or person who could provide this
> service and any idea what it would cost? Or should I just attempt it myself?
> (And where would be the best place for a novice to get the caps at the right
> price?)


The boards have multiple layer traces, working on one of these would be
quite a specialised task. I doubt any home hobbyust would have the gear
to do it.

 
Reply With Quote
 
Gregory Parker
Guest
Posts: n/a
 
      11-28-2003
On Fri, 28 Nov 2003 12:43:13 +1300, Mainlander <*@*.*> wrote:

>In article <Punxb.11612$(E-Mail Removed)>,
>~misfit~@his_desk.com says...
>> I have a mobo here that has bad caps. Of the 25 or so large ones ten are
>> domed or bulging. The PC spontaneously re-boots after 30 seconds or so.
>> (Tried with three different PSUs).
>>
>> I haven't attempted doing anything like replacing caps on a mobo before, I
>> may be capable of it but would hate to risk the board. I'm in South
>> Auckland, does anyone know of an outfit or person who could provide this
>> service and any idea what it would cost? Or should I just attempt it myself?
>> (And where would be the best place for a novice to get the caps at the right
>> price?)

>
>The boards have multiple layer traces, working on one of these would be
>quite a specialised task. I doubt any home hobbyust would have the gear
>to do it.




Yes very true and Speacial LOW ESR Elec Caps that you can't just buy here
over the counter, but can from RS or Farnel.


 
Reply With Quote
 
~misfit~
Guest
Posts: n/a
 
      11-28-2003
Mainlander wrote:
> In article <Punxb.11612$(E-Mail Removed)>,
> ~misfit~@his_desk.com says...
>> I have a mobo here that has bad caps. Of the 25 or so large ones ten
>> are domed or bulging. The PC spontaneously re-boots after 30 seconds
>> or so. (Tried with three different PSUs).
>>
>> I haven't attempted doing anything like replacing caps on a mobo
>> before, I may be capable of it but would hate to risk the board. I'm
>> in South Auckland, does anyone know of an outfit or person who could
>> provide this service and any idea what it would cost? Or should I
>> just attempt it myself? (And where would be the best place for a
>> novice to get the caps at the right price?)

>
> The boards have multiple layer traces, working on one of these would
> be quite a specialised task. I doubt any home hobbyist would have the
> gear to do it.


I realise it isn't just like soldering two wires together. I have a
fine-tipped, low-wattage soldering iron and a mate who has a solder-sucker
that I can borrow (He has quite a well equiped soldering-station actually,
he used to design and build his own PCBs, I might have to attempt it at his
place or get him to do it). I'm still waiting to hear back from 'The Flash'
on his offer of looking at it for me.

It all depends on the price of the replacement caps really. I can get a new
Tualatin-compatible mobo for $125 delivered. It's just that it doesn't have
on-board RAID and uses a VIA chip-set.

LOL, I've actually replaced a cap before by ripping off the 'cap' and
soldering a new one to the pins left protruding from the board. Not very
elegant but it worked at the time. Not sure I'd like to do that to 20+ caps
though.

Cheers,
--
~misfit~


 
Reply With Quote
 
Mainlander
Guest
Posts: n/a
 
      11-28-2003
In article <PoAxb.12276$(E-Mail Removed)>,
~misfit~@his_desk.com says...
> Mainlander wrote:
> > In article <Punxb.11612$(E-Mail Removed)>,
> > ~misfit~@his_desk.com says...
> >> I have a mobo here that has bad caps. Of the 25 or so large ones ten
> >> are domed or bulging. The PC spontaneously re-boots after 30 seconds
> >> or so. (Tried with three different PSUs).
> >>
> >> I haven't attempted doing anything like replacing caps on a mobo
> >> before, I may be capable of it but would hate to risk the board. I'm
> >> in South Auckland, does anyone know of an outfit or person who could
> >> provide this service and any idea what it would cost? Or should I
> >> just attempt it myself? (And where would be the best place for a
> >> novice to get the caps at the right price?)

> >
> > The boards have multiple layer traces, working on one of these would
> > be quite a specialised task. I doubt any home hobbyist would have the
> > gear to do it.

>
> I realise it isn't just like soldering two wires together. I have a
> fine-tipped, low-wattage soldering iron and a mate who has a solder-sucker
> that I can borrow (He has quite a well equiped soldering-station actually,
> he used to design and build his own PCBs, I might have to attempt it at his
> place or get him to do it). I'm still waiting to hear back from 'The Flash'
> on his offer of looking at it for me.


I'd take note of what Alan said in his post about repairing these things.
If you damage the internal traces there's no way of repairing them, so
you'd want to be pretty sure what you're doing.
 
Reply With Quote
 
 
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
integer >= 1 == True and integer.0 == False is bad, bad, bad!!! rantingrick Python 44 07-13-2010 06:33 PM
Bad media, bad files or bad Nero? John Computer Information 23 01-08-2008 09:17 PM
ActiveX apologetic Larry Seltzer... "Sun paid for malicious ActiveX code, and Firefox is bad, bad bad baad. please use ActiveX, it's secure and nice!" (ok, the last part is irony on my part) fernando.cassia@gmail.com Java 0 04-16-2005 10:05 PM
24 Season 3 Bad Bad Bad (Spoiler) nospam@nospam.com DVD Video 12 02-23-2005 03:28 AM
24 Season 3 Bad Bad Bad (Spoiler) nospam@nospam.com DVD Video 0 02-19-2005 01:10 AM



Advertisments