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**kaniki** · 07-08-2010, 12:36 AM

Re: Help! Recapping Gone Bad...

first, i would check to see if you damaged any of the power circuit lines (the mini data or power lines just under the surface of the coating) on the motherboard. with how many scrapes that there are on the motherboard, i would worry more about them being damaged then about if the cap is going to get a good connection.. as for the caps.. i would just try soldering them in place.. if it does not work, then you know that you dont have a good connection and easy to fix after that.. on th condition that none of the other main circuits are damaged..

and just out of curiosity, did someone do some soldering of the little mini caps?? on the board.. the ones that are something like 1mm thick and wide and 2mm long..?? Im just wondering because some of the solder joints one them look not that great to have come from the factory like that.. they have rough looks, solder spikes coming up, and the one looks like it either has, or almost has a completed circuit on top of it from the excess solder on top of the mini capacitor.. its the one that is on the right side of that chip that has the code "42H0RHK" on it.

**MXM** · 07-08-2010, 12:14 PM

Re: Help! Recapping Gone Bad...

thanks for the reply, so bad im kinda workin on/off today cause its my bosses bday

i did some manual resoldering of certain areas, do you advise me to do it again? with more care? lemme update a little with pics, as of right now i have already cleaned it with iso, the board booted but close to the minute running mtest got stuck again. this time it just froze without weird characters showing. i tried to see if itd boot again and it did not, no POST, so i went to eat -bday- and came back and tested again and it booted, then i turned it off and is where i am right now, im gonna take pics so u can see the mess i did this time. last time on test: booting, but still gets stuck.

thanks for your time. will put pics asap.

**MXM** · 07-08-2010, 01:28 PM

Re: Help! Recapping Gone Bad...

UPDATE: Wel, continuing the whole "this is not how to do it" thread

, this is how i managed to solder the mentioned area... i am sorry about my poor quality at work, i just have no excuse for that but the fact that i work under a lot of pressure

i also applied some soldering to the top, with the idea of making sure the contact is made at least somewhere, do you think this is correct?

https://www.badcaps.net/forum/attach...id=16761&stc=1
https://www.badcaps.net/forum/attach...id=16762&stc=1
https://www.badcaps.net/forum/attach...id=16763&stc=1
https://www.badcaps.net/forum/attach...id=16764&stc=1

as i mentioned, the board managed to boot, first try got stuck really quick and then it didnt boot right after, then it rested for a while and then booted again, I also would like to know if theres a spot where i could bridge the caps on the VMR to make sure of their contact too? i have checked for continuity on their positivo leads within those rails in the middle but then again the negative also gives some so i am not sure if its safe to bridge -and who- that way....

https://www.badcaps.net/forum/attach...id=16767&stc=1
https://www.badcaps.net/forum/attach...id=16768&stc=1

Any idea, suggestion, tip, direction is really welcome and appreciated,.

Thanks for your time and replies.

Attached Files

**PCBONEZ** · 07-08-2010, 01:35 PM

Re: Help! Recapping Gone Bad...

You didn't get any solder into the vias.
Look at pic 2.

I think your iron is too cold.

.

**MXM** · 07-08-2010, 01:46 PM

Re: Help! Recapping Gone Bad...

ive been suspicious about the iron being too cold as wel but that is something sometimes runs out of my hands since at this same area theres a rack, server switches and wel u know the whole cooling thing, but still, i can manage to turn AC off for little whiles, u think i should resolder like it is of i should remove and resolder all over again? my current plan is, since i have already turned the AC off i plan on adding some flux and resoldering like it is.

any idea is very welcome.

thanks for your time and replies.

**PCBONEZ** · 07-08-2010, 02:50 PM

Re: Help! Recapping Gone Bad...

You should get a hotter iron before anything else.

A hot iron heats a small area [ideally just the joint] very fast so you are on-off quick.

Too cold an iron heats a large area slowly and might never get the joint to the proper temp because the heat 'runs off' through the board faster than the iron can heat the joint.

Hot iron - like using a branding iron on leather.
Cold iron - like trying to brand leather with a light bulb.

**PCBONEZ** · 07-08-2010, 02:51 PM

Re: Help! Recapping Gone Bad...

Once you have a hotter iron I'd just wick off the blobs and apply new solder.

.

**MXM** · 07-08-2010, 03:20 PM

Re: Help! Recapping Gone Bad...

^ thanks, im gonna get me one of those irons that dont have controlled temp and stuff, i myself use the weller i recommended on other thread

as for my current work i always add some flux to improve the soldering, but i will surely get that other.

peace.

**PCBONEZ** · 07-08-2010, 04:26 PM

Re: Help! Recapping Gone Bad...

Maybe the element in the weller is burning out.

**ratdude747** · 07-10-2010, 02:45 AM

Re: Help! Recapping Gone Bad...

Originally posted by MXM

^ thanks, im gonna get me one of those irons that dont have controlled temp and stuff, i myself use the weller i recommended on other thread

as for my current work i always add some flux to improve the soldering, but i will surely get that other.

peace.

if it is flux cored, then you do not need to add more flux, all it does is make a bigger mess of your soldering tip and your board... the flux in flux-cored is in most cases more than plenty.

that weller might not be hot enough... good quality does not mean good specs... like taking the best quality lawn mower engine and expecting it to power a semi.

whre do you live? in the usa, i recommend the xytronic 258... the local electronics shop had them dirt cheap ($20), temp controlled, and they have a very good selection of tips... i use the stock tip for most stuff and the mini-chisel when i need to get really small. just do not try t use it on a mac board or any other board with large ground planes... not going to work. for all else, it works really well...

**kaniki** · 07-10-2010, 03:01 PM

Re: Help! Recapping Gone Bad...

Ok. here are a few things. First, I agree. Either the solder gun is not getting hot enough or you are reheating the solder way too many times. If solder has only been heated 1 or 2 times and and is heated hot enough, then it should have a nice even flow to its look. You see how yours has this really rough look that almost makes it look brittle. That only happens if the solder gun is not hot enough or the solder is heated too many times..

As for the the caps, is there some reason that you have them pulled way out of the socket and did not solder the caps flush with the board? Personally i prefer flush unless you plan on bending them, say 45 or 90 degrees because of space restraints. If you just leave them up in the air and straight, then that makes more of a chance that someone will hit or bump them later and possibly damage the cap.

Did you do the really small ones that are like 1mm or 1 1/16 inch high.. A lot of them have a really rough look too and did not know if you bumped them or soldered them too.

When you do solder, you usually try to keep the solder on the back of the board with standard caps. the one that you have has the solder on the top and bottom of the board with a little blob on both sides.. You dont need to solder the cap lead on the cap side of the motherboard, just the back side. A little of the solder should run into the joint to fill in the space between the cap lead and the board when you solder it from the back. that should be all you need.

As for a temp controlled solder gun. I just have a regular one temp solder iron here and that one works fine for soldering. It is not bad to have the temp controlled one, it is all down to preference, but if all you are soldering is just regular caps, then a regular solder iron with the standard point will do. just make sure the what ever one you use, it is hot enough to melt the solder fairly quickly.

as for the flux, like they said, very little flux is actually needed. IF you do use too much flux, then it is going to get around things that it is not supposed to be and will cause shorts that will make the PC act up. make sure that all excess flux is cleaned of.. in spaces that you can and can not see (like under caps).

Attached Files

**PCBONEZ** · 07-10-2010, 03:11 PM

Re: Help! Recapping Gone Bad...

I agree you don't need a temp control.
My stations have it but I crank it all the way up and leave it there anyway.
Easier to control things by just looking at the joint while you work.
.

**ratdude747** · 07-10-2010, 09:47 PM

Re: Help! Recapping Gone Bad...

i keep my iron all the way up as well...

**MXM** · 07-14-2010, 09:30 AM

Re: Help! Recapping Gone Bad...

hello and thanks for the replies, i bought one of those cheap irons and wel it was too damn cheap it broke in the middle of resoldering

and wel i managed to get the temp a little up in here and the last days ive been doing a manual resoldering of all the board, im done, didnt finish the whole board but most of its top part. still it is not working. i blame it on some defective vias -since i cant track that i guess-

heres how these areas look like now.

and Thanks again

Ive been trying to upload pics and i cant, is it me or this isnt working at the this time??

**PCBONEZ** · 07-14-2010, 12:05 PM

Re: Help! Recapping Gone Bad...

How does one break a soldering iron?

**retiredcaps** · 07-14-2010, 12:21 PM

Re: Help! Recapping Gone Bad...

I would love to see a picture of the broken iron.

Originally posted by MXM

hello and thanks for the replies, i bought one of those cheap irons and wel it was too damn cheap it broke in the middle of resoldering

**MXM** · 07-14-2010, 01:50 PM

Re: Help! Recapping Gone Bad...

like from the base, were the handle ends and the iron starts. i guess the plastic couldnt handle it haha... i said it broke cause you know i was using it, and out of the sudden at the middle of soldering..... it split in two

the only bad was the small burnt i got, but nothing for the ER

mi internet is being a bitch took me 3 hours to upload the pics for my other thread on this board today... but lemme give it a new try on this.

https://www.badcaps.net/forum/attach...id=16889&stc=1

k it worked

on the other hand... can anyone please give me some advise, the board in mention has a thread with all the info of what ive done to it, pics and stuff, anything is welcome.

https://www.badcaps.net/forum/showthread.php?t=10266

thanks

Attached Files

**MXM** · 07-14-2010, 02:02 PM

Re: Help! Recapping Gone Bad...

Originally posted by kaniki

Ok. here are a few things. First, I agree. Either the solder gun is not getting hot enough or you are reheating the solder way too many times. If solder has only been heated 1 or 2 times and and is heated hot enough, then it should have a nice even flow to its look. You see how yours has this really rough look that almost makes it look brittle. That only happens if the solder gun is not hot enough or the solder is heated too many times..

As for the the caps, is there some reason that you have them pulled way out of the socket and did not solder the caps flush with the board? Personally i prefer flush unless you plan on bending them, say 45 or 90 degrees because of space restraints. If you just leave them up in the air and straight, then that makes more of a chance that someone will hit or bump them later and possibly damage the cap.

Did you do the really small ones that are like 1mm or 1 1/16 inch high.. A lot of them have a really rough look too and did not know if you bumped them or soldered them too.

When you do solder, you usually try to keep the solder on the back of the board with standard caps. the one that you have has the solder on the top and bottom of the board with a little blob on both sides.. You dont need to solder the cap lead on the cap side of the motherboard, just the back side. A little of the solder should run into the joint to fill in the space between the cap lead and the board when you solder it from the back. that should be all you need.

As for a temp controlled solder gun. I just have a regular one temp solder iron here and that one works fine for soldering. It is not bad to have the temp controlled one, it is all down to preference, but if all you are soldering is just regular caps, then a regular solder iron with the standard point will do. just make sure the what ever one you use, it is hot enough to melt the solder fairly quickly.

as for the flux, like they said, very little flux is actually needed. IF you do use too much flux, then it is going to get around things that it is not supposed to be and will cause shorts that will make the PC act up. make sure that all excess flux is cleaned of.. in spaces that you can and can not see (like under caps).

hello and thank you for the reply.

i think the iron wasnt getting the desired temp, i managed to get temp little up here since in the morning no one is and i took advantage of that, besides the person who likes lowering the ac temp comes in the afternoon and she does it cause shes on the change

anyways,

the reason why i soldered those caps with some roon was to put some solder em from the top side of the board instead of the bottom, why, cause as u can see in the pics i really fucked the wholes on the bottom, like there was nothing to stick the solder in.

As for the other caps yeah i tried to resolder the board, there are newer pics on the board thread, and looks a liiiiittle different.

I appreciate your advise on the soldering technique, I will try to improve it.

as for my controlled solder gun, is there a way to by-pass that? im guessing theres is but not sure how... like removing a thermistor or something like that?

as for the flux thanks, i did use flux on over but i did cleaned it with ISO, as for right now i am gonna heat it up again and see what happens....

Thanks for your time.

**kaniki** · 07-14-2010, 07:14 PM

Re: Help! Recapping Gone Bad...

just an idea, but if you are leaving them up to solder from the bottom, i dont think that it will help much. since the solder joint is supposed to be on the bottom of the board, then there is not always anything on the top of it to get any kind of a connection to. If you want to make sure that it gets as good a connection as possible, what i would do is this. before you put the cap in, make a quick solder layer on both of the cap leads to make sure that the solder will stick good. Then solder them into place. while soldering them in, keep the heat on the solder and slightly pull the cap out and then push it back in which will/should pull the cap lead partly out of the hole and then back in. You dont need to pull it all the way out. Having the little bit of extra solder on the back of the board and keeping heat on it while you partly pull it out and then push it back in should pull solder into the hole to make a good connection and fill any air holes around the cap lead to the board to make a good solder connection all the way through the board and that should make as good a connection as the one that you did having it pulled way out. Pre-soldering the leads will make sure that the leads will hold the solder good too and since they were just done, the need for flux should not be needed because there should be no build up of dirt/oils on any of the solder connections so the solder will hold good too.

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