I have a RX 470 that I bought to repair, because it had a broken chip which is what controls the fan, being a bipolar transistor.
she has her memories burned and was not fed.

After replacing the (mmdt3904-7) bipolar transistor, and the same control chips that were shorted: GS... and APW...
this is already being fed in all places.
The same when I connect to the PC does not detect the chip and the fans only run when it is already hot.
Chip warms up and the memories too.
How do I get the chip to boot?

Any idea Any idea
or the chip is burned?

You need to follow the diagnostic procedure. PCIe signals integrity, resistances of voltage rails and many other factors. What PCB version is it?

GPU PCB model is V341_20.

I would like to understand more about this, if you can help me, I would appreciate it.

Search for Schematic MSI MS-V341, u can get guide from there.


Follow this recomended

Hello people

These days I've been in analysis. Checked for defective chips.
on vrm had 3 defective chips and had an output condenser on pcb botton ripped out.
I put the capacitor back in and put in 3 new chips and 2 used coils from another gpu that burned on the other side, but they're good.

With this I got the circuit much better, but now I have 1 problem and I don't understand why this is.

In image 1 I made the drawing of the oscilloscope measuring the wave, being a square wave. It appears on all coils except the one marked in image 2. Even so, it passes 0.850V on that coil, but without such a wave.

can you give me a hand?




Image 1: https://ibb.co/sR6FTtQ

Image 2: https://ibb.co/W6mXkqh

If you don't have pulses there you have to investigate this particular phase.