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/diy/ - Do-It-Yourself

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1070939 No.1070939 [Reply] [Original] [archived.moe]

Is it possible to learn how to change capacitors from computer motherboards till monday? If yes please tell me how. I've read about it on google of course but am really afraid that I won't be able to do it and its for my job.

>> No.1070942

yeah..... so why don't you ask again... in English this time. Also if you read about it? then do it. man up puffball.

>> No.1070943

>in English this time
Yeah I'm in hurry but since you replied to me its coherent enough.
>then do it
I will have to anyway but I don't want to fuck it up.

>> No.1070947

well then you are screwed....
OR you can get a crappy mother board and practice.

also breathe in....
breathe out...
breathe in....
breathe out...
breathe in....
breathe out...

>> No.1070949

>crappy mother
exactly what I'm going to do this 2 days but the motherboard is not working so I can't tell if I did it right

>> No.1070951

>till monday
Do you mean by Monday?

>> No.1070952

the point is snowflake, do like all of us did at one time. figure it out on your own, or curl up your toes and die. No one can tell you how to do something, at some point you have to start doing it.

Things I did not know how to do until I did them:
fix an evaporative cooler.
replace capacitors in motherboards.
build a trailer.
fix old tube radios.
build a power supply.
replace a radiator in a car.
re-blue a gun.
re-load ammunition.

all of the above I learned how to do by myself. with very minimal input from others. just about everything you need to know about replaceing caps can be found on the internets.

I'll throw you a bone:

>> No.1070954

Like I said already I'm in hurry otherwise I would have not bothered myself ask here, you know? I have really limited time to learn it by myself.

>> No.1070956

Put soldering iron on caps leads, the heat will travel so don't try to get under the cap

Remove the cap

Put new cap down

Supply heat to one lead, while attempting to apply solder, when it gets hot enough solder will find is spot (Assuming rosin core)

>> No.1070958

>in a hurry

you are screwed. replacing caps takes practice. it's very precise and fine work on a motherboard. do it wrong and the board won't work. you have to practice, so stop being in a hurry and start practicing.

>> No.1070960
File: 205 KB, 848x579, derp.png [View same] [iqdb] [saucenao] [google] [report]

I can't believe nobody's mentioned this, but here goes:
Nobody solders stuff on motherboards.
Not since I've been working with computers, and that's the last 30 years or so.
I suspect someone at work is jerking your chain.
If not? Well, then you better man up, puffball.

>> No.1070961

the ONLY way you will learn is by yourself.

>> No.1070962

I fix them all the time.

>> No.1070963

I thought so too but our boss is a super jew who wants to sell even the shittiest of the shit computers that are with pentium fucking 4.

>> No.1070966


why so butthurt

anyway, all op needs to do is desolder the old cap, remove it, then solder the new one in... tons of utub videos on this topic...

>> No.1070968

There is no magic to it. You replace the broken capacitor by one with identical rating. What you have to learn is how to solder through hole components. Get some antique, broken electronics and start soldering/desoldering the heck out of it, that's all you have to learn. If you are a complete beginner probably watch one of those 30 minute soldering 101 videos before you do that.

>> No.1070973

I'll tell you a little secret about motherboard repair....

Are you ready.....
If the motherboard won't POST You have nothing to lose. if you replace the caps correctly and it still does not work then something else blew! and SMD component or maybe the chipset.

If it did not work before the recap and does not work after it's not your fault.

I was given an HP ML350 g3 server. It worked fine but when I went to clean the dust bunnies out of it I found 36 blown caps! how it was working is a mystery.

I spent 3 hours carefully replacing the caps and had to mount the board in the case 5 times before I got it right. Those tiny little soldering pads are a pain to get right. The new solder they use and the tiny through holes make it very difficult to get the old caps out and have a clean open hole. but I did it. I used that server for 2 or 3 years before selling it.

man up sparky! you kan do it you little knipper!

>> No.1070974

>If the motherboard won't POST You have nothing to lose
I know but these computers work( i tested them myself) and I just have to replace their capacitors, thats whats terrifying me.

>> No.1070976

well take your time.

do you have the following?:
a soldering iron with variable heat control and a small flat tip?
a lighted magnifying glass?
a stainless steel dental pick?
something to hold the motherboard secure and off the work surface?
solder wick? or a solder sucker?
a pair of balls?

>> No.1070978

>holes make it very difficult to get the old caps out and have a clean open hole
Here's a tip for if you have nothing to lose.
Get as much solder out of the hole as you can. If there's still a tiny bit of the cap in the hole, pound it out with a tiny sewing needle and a hammer. I've done this a couple times with great results.

>> No.1070981
File: 61 KB, 476x349, tactical facepalm.jpg [View same] [iqdb] [saucenao] [google] [report]

>thats whats terrifying me.

A working motherboard is also a good thing, it means that when you finish the recap it should still work, unless you put a cap in backwards, broke a trace, or solder a pad to ground.

that's why you practice and take your time.

>> No.1070982

>well take your time.
Of course I'm going to do only that this weekend just in hope to not fuck up in Monday.
>a soldering iron with variable heat control and a small flat tip?
Its a generic soldering iron and doesn't have heat control.
>a lighted magnifying glass?
I think I can see everything just like that.
>a stainless steel dental pick
for what?
>something to hold the motherboard secure and off the work surface?
Isn't the table enough? Its not like I'm going to press it heavy or punch it, after all.
>solder wick? or a solder sucker?

Also I just desoldered one of the caps but it was way too messy and hard.
I will practice obviously but am not sure if its going to be enough

>> No.1070985

Your generic soldering iron will not be hot enough, or may be too hot.

You need a magnifying glass to see that you have not solder over from a positive pad to the surrounding negative ground that will be a fraction of a millimeter away. It is very easy to short them out this way.

The stainless steel pick is to open the holes with. read the 3 post on badcaps.net here: >>1070952

If you do not have you MB held down you can slip and cut a trace and that will fuck everything up. plus you need to be able to hold the cap while unsoldering it.

So I have to go now. I have manly things to do. I will return in a couple of hours.

>> No.1070991

It's a 30w one so I guess its not enough?

>> No.1071005

Oh cool, you work for Gigabyte?

>> No.1071013


>> No.1071016

Are you sure?

>> No.1071027


>> No.1071028

So what should I try with? The guy who removes caps from tv uses 45w but its controlled and goes to 500c. Also I got few caps but its so difficult, but maybe there is a way to do it with this one?

>> No.1071033

Jesus fucking christ do you want one of us to come over there and do it fucking for you?

>> No.1071035

The problem with motherboards is that the solder does not have lead in it and that makes it melt at a higher tempurature. Also the holes are small. you need a small flatish point on your soldering iron and lots of heat (for removal only). For soldering you use real lead based very small diameter solder.

You know if you lived close by I would come over and show you, but seriously stop whining and do your best with what you got. you will probably mess it up, I know I would with that kind of equipment.

>> No.1071036

yes, yes he does.

>> No.1071042


>> No.1071051

Why is it so hard for you guys to relate to someone in need? I will literally get fired if I don't change the capacitors.

>> No.1071059
File: 23 KB, 375x300, 1471813917856.jpg [View same] [iqdb] [saucenao] [google] [report]

Because they have repeatedly given you answers and advice, and you're still here, not doing what you need to do.

Re-read this thread. Read linked pages. Watch linked videos. Go get the shit you need to get the job done, and do it. It is not rocket science. Replacing a cap is basic shit. I desoldered and replaced a cap on a motherboard with some shitty radio shack iron that had no temp control and replaced it when I was so green that I didn't even know what the hell thinks like flux or desoldering braid were. Shit worked perfectly fine.

Go replace the cap and keep your job, or keep whining and lose it. Choice is yours.

>> No.1071073
File: 446 KB, 300x186, this.gif [View same] [iqdb] [saucenao] [google] [report]


>> No.1071075

Not really because I said million times already that I work constantly on it and it doesn't fucking happen the way it should be.

>> No.1071077
File: 216 KB, 322x236, youlose.gif [View same] [iqdb] [saucenao] [google] [report]

I said /thread.

>> No.1071078

Thanks for keeping my thread on the first page though

>> No.1071084

you will get more abuse that way.

>> No.1071085

>work constantly on it
that is your problem, you are supposed to solder it no longer than 2 seconds you dumb fuck

>> No.1071086

simply ebik

>> No.1071099

It doesn't help that your posts are scatterbrained. You need to fix a motherboard or you're fired. But the motherboard works, but now it doesn't. You need to learn, but you've been working on it? And what do you mean "the way it should be"? As in, turning on?

You're throwing in details as we go along. Start from the beginning, and tell us what the fuck you've done, and maybe someone can assist you from there.

PS: you think /diy/ is bad at helping? Maybe you should go ask /g/.

>> No.1071101

I gave OP 3 links on a forum site all about bad capacitors and that is all he needed, they have detailed information about replacing caps and how to do it, and a very helpful forum (that I have used).

>> No.1071184

This. What even is going wrong, what have you been "trying"?

Also, for my curiosity, what kind of figured up situation are you in where you are this new to soldering, but have to replace caps or you are fired? What is happening?

>> No.1071190

>an African trying to learn to recycle old dells to make a buck wants us to solder caps for him
Is this sort of like the Nigerian prince scheme?
OP can barely type in English, what makes you guys think you can help him?

>> No.1071320


Literally this guy is the only thing you need.

He has a forum too where you can ask logic level board repair questions.


>> No.1071340


>> No.1071351

Not really. Its either my soldering iron or me being a retard(most likely)

>> No.1071362

OP here, I decided to tell my boss to fuckoff and fix his own boards. if they work why should I replace caps. its pointless and boss is trying to make me look stupid. besides, I have a job repairing shit and I dont know how to solder and im going to kill myself now because I am a worthless stupid fuck. bye all

>> No.1071372
File: 78 KB, 796x541, drama queen.jpg [View same] [iqdb] [saucenao] [google] [report]


>> No.1071377
File: 30 KB, 640x480, 1253805492428.jpg [View same] [iqdb] [saucenao] [google] [report]


>not knowing that you got trolled and that was obviously not OP

>> No.1071387

this dude gonna fry his motherboard.
Post updates, anon

>> No.1071391

dude, calm down! you are NOT stupid. first off, make sure you are using electrical rated solder. The other shit will NOT "stick." If one has never done something then they lack some knowledge but they are not stupid.

>> No.1071397


OP IS stupid. how the fuck do you have a job repairing shit, but he doesnt know how to solder? OP deserves to get fired for being a fake incompetent fucktard

>> No.1071456

His reply makes more sense knowing it wasn't OP. You reverse trolled yourself.

>> No.1071477
File: 173 KB, 922x718, needle.jpg [View same] [iqdb] [saucenao] [google] [report]

there are 2 main difficulties in replacing caps. the first is that the negative terminal is connected to a lot of copper so it takes a long time to heat. with a 35W iron, it can take a minute. (1) dump a big blob of solder on the terminals, and angle the iron so you can heat both terminals at once, and pull off the cap with your other hand.

(2) cleaning the negative hole is a huge pain. the trick most likely to succeed is to stick a sewing needle into while heating it. then let if cool and pull out the needling by twisting.

you need to practice on actual motherboards, coz normal PCBs are a lot easier.

>> No.1071561

knowing full well it is not op, but I get to use a reaction pic.

>> No.1072611

>Determine which capacitors need replacing
>measure the dimensions
>toddle on over to some place online where you can buy new ones
>farnell is my favorite
>place an order
>desolder old capacitors using solder sucker and de-soldering braid
>insert new capacitors
>if it works then you fixed it

>> No.1072616

Also a cheap hardware store soldering iron won't do, you'll need something with a regulated temperature tip or else you'll just bake the traces off the board before you can even get the cap out (motherboards are tight).

>> No.1072653

Multi layer boards will be ruined by trying to desolder cap with basic tools. Better to smash old capacitor and solder new one to remaining leads.

>> No.1073003

Never ask /g/ for legitimate answers

>> No.1073016

Yes it can be done by a professional if you pay for a repair. But, without soldering tools and instruments you cant do anything and in a few days it's impossible to learn.

>> No.1073019

Also whatever broke those capacitors is usually a faulty mosfet transistor, so if you replace caps odds are that they will break soon again.

>> No.1073024

just a question
will you get fired if not done by Monday?

if not
tell your boss you can't make it in time
it's better to be honest than standing on deadline with an unfinished product

>> No.1073082


>> No.1073173

My guy

>> No.1073975


You have absolutely no idea what you are talking about.

>> No.1074189

Metal transfers heat fast but it's not superconductor. You can use that to your advantage by working fast. This way you can get the local area around pin hot enough and have some time before rest of the board sucks the heat away.

Let your soldering iron heat up, put a large-ish blob of solder on the tip. Let it heat up again. Dump it on the pin with real intimate touch and be quick to do whatever you want to do (pull the part or aid the solder to cover the new pin and pad), remove solder before it all goes KaK.

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