Burned VRM

[JMKirkham]

I know it is unlikely and probably a stupid question to ask but is their any way of fixing a motherboard with a burned vrm?

[KarathKasun]

Only if you have lots of patience, experience with hot air soldering, and experience PCB level repair.

[Skiiwee29]

shes a dead to 99.99% of people.... could send it in to Louis Rossman and he could repair it for you. 

[Windows7ge]

2 minutes ago, Skiiwee29 said:

shes a dead to 99.99% of people.... could send it in to Louis Rossman and he could repair it for you. 

Louis Rossman has stated that he does not do PC repair. Primary reason being no schematics. If the VRM blew chances are something else caused it, meaning something else probably blew with it. It'd become a troublesome game of locate what else died. He wouldn't be interested unless it's something special. Occasionally he takes special cases.

[RobbinM]

You could try soldering in a new chip, they're cheap.

But I'm with above; figure out what caused it so that it won't happen again.

[JMKirkham]

What shorted it a wrong modular pci cable for my psu.

[asand1]

It wouldn't be that hard with a small heatgun.

[KarathKasun]

2 minutes ago, asand1 said:

It wouldn't be that hard with a small heatgun.

Heatgun will damage stuff around the soldering location.  You need an air soldering station.

 

Even then, you may need to dig out the traces under the component and repair the board itself.

[asand1]

Yeah I couldn't remember the name of the air soldering station. I'm sure you could get one for less than the price of a new card and then have it for later projects as well.

[KarathKasun]

1 minute ago, asand1 said:

Yeah I couldn't remember the name of the air soldering station. I'm sure you could get one for less than the price of a new card and then have it for later projects as well.

Cheap ones are ~$100.  You may be able to get a (possibly one time use) Chinese one for ~$60.

[JMKirkham]

Does anyone know where I could find a VRM mofset?

[bowrilla]

52 minutes ago, JMKirkham said:

Does anyone know where I could find a VRM mofset?

If Mouser doesn't have it you're probably out of luck.

 

You can try and mend it but I wouldn't expect any wonders. You've probably fried more than just that single Mosfet. Chances are high that some traces might be damaged as well and you possibly fried other components as well. You'd need several hundred dollars worth of equipment to diagnose and fix that. Give that mosfet a try (you need to be sure to get the right one that matches the rest of the board) but don't expect much.

 

P.S.: some of the coils look pretty scorched as well and the PCB around that blown mosfet definitely took some damage. Without schematics you're flying blindly.

[Stefan Payne]

On 2/18/2019 at 7:31 PM, JMKirkham said:

I know it is unlikely and probably a stupid question to ask but is their any way of fixing a motherboard with a burned vrm?

No, as the Burning destroyed the PCB in that area and loosened the Traces from the Board.

Since you have to ask, I have to tell you that you are not able to fix the Board as it requires some skill, knowledge, innovative thinking and also there remains the Problem of Heatsinking the MOSFET, wich isn't possible as the PCB is destroyed, wich is used for Heatsinking.

 

PS: Gigabyte X79 Board??

 

56 minutes ago, JMKirkham said:

Does anyone know where I could find a VRM mofset?

Its not as easy as that. If it had been an older TO-263 package, all you need to do is replace the MOSFET with a pair of matched MOSFETs, as the PCB would have been (mostly) fine with that packaged MOSFET.

 

However, we're talking about an even smaller package that tends to burn the shit out of the traces it is soldered to, destroying the Traces and so on.

 

I have a similar Problem, looks like that:

 

And to make matters worse:
That's the HIGH SIDE MOSFET.

Meaning that your CPU might have gotten a +12V Pulse and died...

 

So you shouldn't get your hopes up and/or at least look if your CPU is still alive...

[Spotty]

On 2/19/2019 at 5:58 AM, JMKirkham said:

What shorted it a wrong modular pci cable for my psu.

How did a PCIe cable fry your motherboard vrm? Did you try plugging a PCIe cable in to the CPU power socket?

 

What system do you have? Motherboard? CPU? If it's an older cpu/motherboard, since you're looking at replacing the motherboard and potentially a dead CPU, might be worthwhile upgrading the entire platform rather than just replacing the motherboard.

[KarathKasun]

You applied reverse voltage.

 

There is absolutely more damaged than that mosfet.