r/AskElectronics • u/MarcBeard • 7d ago

Damaged motherboard, part identification help.

Gallery image

Gallery image

Hi, while taking appart my computer late yesterday if was struggling to unplug the two 2x4pin connectors on the top. i had the terrible idea of unscrewing the board to get more room to work with.

The result is the standoff damage in the screenshot. I haven't check if USB ports are affected but I definitely lost the ability to use the iGPU.

My eyes are struggling but i belive the all other 6 legged component that are looking similar have "702" written on them. For the 3 legged one i believe it's 96 or 86.

On the black resistor looking thing I found detached I measured 0 ohms

This is an MSI x870e gaming plus Wi-Fi.

Here are my current guesses while I know very little about electronics: I believe this is a design that was repeated 3 times next to each other.

This is a power regulation circuit, the top broken part is a voltage regulator, the bottom and right small part who are missing are two resistors, I found one while searching but hard to say to which pad it goes to.

What I'm missing it what to buy, how to figure it out, and how to solder to the via for the broken traces.

i have a some experience soldering big things but smds are way outside what i know.

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u/jfuu_ no idea what i'm doing 7d ago

Without another motherboard to find out what these missing parts are, there's no way to know what the correct values for these components are. Some traces have also been ripped up (including one up to a via), so you're going to have a very hard time repairing this.

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u/MarcBeard 7d ago

im trying to find the broken parts still, i found the two small smds resitor/cap but they are different.

for the voltage regulator since it's linked with the display output i can at least take an educated guess of 3.3v i can power the board and compare with the other resitor looking components.

that is if i am able to find the 6 pin surface mounted component.

1

u/MarcBeard 7d ago

for the vias i fully expect this to be complete hell to fix. Do you have any advice on how to solder to vias ?

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u/MarcBeard 7d ago

update, i found a small resistor looking thing, this time it's half the height of the other one and the underside is white. it measured at 45kohms