Anywhere to get a MOSFET soldered back on?

[John600rr]

I'm looking for a company (or an individual) who has the ability to solder MOSFET's onto my 7900GT card. I removed the MOSFET, but don't have the skills / tools to install the new one.

Can anyone point me in the right direction for a place that does SMD component repair? Thanks.

[Nanometer]

http://www.mouser.com/index.cfm?handler=home
http://www.newark.com/

[t024484]

I'm looking for a company (or an individual) who has the ability to solder MOSFET's onto my 7900GT card. I removed the MOSFET, but don't have the skills / tools to install the new one.

Can anyone point me in the right direction for a place that does SMD component repair? Thanks.
If you do not have the skills to install a mosfet, I seriously doubt if you have removed one.
Show us a picture of the component that was removed, this will allow to give you some more detailed advice.
Even if you find a company, they will have to be told what component it is.

[John600rr]

Okay, here are the pictures. These are of the backside of my 7900GT. It was actually you you recommended the MOSFET to buy, back in the 7900GT Volt Mod II thread.

Okay, the first picture is just to orientate you to where the MOSFET is on the board.

The other two are close ups. I would have liked to left them at a higher resolution, but couldn't get them under 200k.

Also, from the pics you can see by my expert workmanship and soldering / prying skills I also need a couple of SMD resistors replaced.

Any help would be appreciated.

I already have the replacement MOSFET, 10 of them actually.

[Kin Hell]

If you do not have the skills to install a mosfet, I seriously doubt if you have removed one.
Show us a picture of the component that was removed, this will allow to give you some more detailed advice.
Even if you find a company, they will have to be told what component it is.

....over to you t024484! ;)

[Thrilla]

I believe there are a few people providing vmods and soldering services but not sure if you can see it since you have under 100 posts, it's at the bottom of the forums.

Surface mount isn't very hard, just get a 15 watt soldering iron with a fine tip, and thin rosin core silver bearing solder (I use 62/36/2).

If you're hardcore (or plain weird), get a torch, a nail, and a plier with rubber handle. Heat up the nail till red hot, use it as a soldering iron. That's what I use lol, I took apart my soldering iron to see what's in there. Anyway, the major disadvange is that a nail doesn't have enough heat capacity to melt lots of solder.

[t024484]

Okay, here are the pictures. These are of the backside of my 7900GT. It was actually you you recommended the MOSFET to buy, back in the 7900GT Volt Mod II thread.

Okay, the first picture is just to orientate you to where the MOSFET is on the board.

The other two are close ups. I would have liked to left them at a higher resolution, but couldn't get them under 200k.

Also, from the pics you can see by my expert workmanship and soldering / prying skills I also need a couple of SMD resistors replaced.

Any help would be appreciated.

I already have the replacement MOSFET, 10 of them actually.
How on earth did you manage to get this Mosfet ( yes it is a Mosfet ) of your board, and even more intriguing why ?

[John600rr]

How on earth did you manage to get this Mosfet ( yes it is a Mosfet ) of your board, and even more intriguing why ?

Basically I removed the black plastic from the Mosfet (chipped/broke it off). I got it all clean so all that was their was the metal piece. I heated it up with my soldering iron and puled it off. I then removed the excess solder/metal and thats what you've got there.

The reason is that the Mosfet which has been removed burned up during a vgpu mod. I think it was a short somewhere in the wiring, rather than an actual failure.


I believe there are a few people providing vmods and soldering services but not sure if you can see it since you have under 100 posts, it's at the bottom of the forums.

Yeah I can't see that part of the forums. Perhaps could you, or anyone, give me the user id of someone who does this sort of thing, so I can PM them, unless it is against the rules.

Thanks for the help guys. :toast:

[t024484]

Basically I removed the black plastic from the Mosfet (chipped/broke it off). I got it all clean so all that was their was the metal piece. I heated it up with my soldering iron and puled it off. I then removed the excess solder/metal and thats what you've got there.

The reason is that the Mosfet which has been removed burned up during a vgpu mod. I think it was a short somewhere in the wiring, rather than an actual failure.



Yeah I can't see that part of the forums. Perhaps could you, or anyone, give me the user id of someone who does this sort of thing, so I can PM them, unless it is against the rules.

Thanks for the help guys. :toast:
If you managed to take the remains of the mosfet off, you must just as well be able to solder the new part on your board.
On one side of the Mosfet the four pins are all connected to the drain, this is where the large metal area was, and where the 4 separate pins on your board appear, three are connected together to the source and one is the gate.
Only the gate should be handled with some care, are the other pins are uncritical.
But before you start soldering, you can check if your board is still O.K. because there are two complete sets of Mosfets working in parallel but phase shifted.
In the 2D mode, the voltage regulator will be able to generate enough current to start Windows. If it does not display in 2D, expect for the worst.

[John600rr]

If you managed to take the remains of the mosfet off, you must just as well be able to solder the new part on your board.
On one side of the Mosfet the four pins are all connected to the drain, this is where the large metal area was, and where the 4 separate pins on your board appear, three are connected together to the source and one is the gate.
Only the gate should be handled with some care, are the other pins are uncritical.
But before you start soldering, you can check if your board is still O.K. because there are two complete sets of Mosfets working in parallel but phase shifted.
In the 2D mode, the voltage regulator will be able to generate enough current to start Windows. If it does not display in 2D, expect for the worst.


Okay, I think I might be able to get the Mosfet back on. One question, does it matter which way the Mosfet faces, it could go on two ways.

I get no activity out of the card at all when I hook it up. So all this may be for nothing. Thanks though.

[t024484]

Okay, I think I might be able to get the Mosfet back on. One question, does it matter which way the Mosfet faces, it could go on two ways.

I get no activity out of the card at all when I hook it up. So all this may be for nothing. Thanks though.
Yes of course does it matter how you mount it.
Look at the suppliers spec to get the details.