RTX 2070 troubleshooting

[madverkus]

Hello, I just bought a RTX 2070 which was from a broken prebuilt PC.
This GPU gives just a black screen but the PC still boots up, not recognized by Windows.
This is my first broken GPU which I am troubleshooting since trying to learn how these things work.
This GPU has no prior repairs done and I just took the heatsink and stuff out of the way and did some basic multimeter measurements and came up with few questions.


If you can see anything concerning on the board let me know

None of the connectors were shorted ground, on the first picture the red marked coil is shorted ground and I marked couple of the coils on VRM with blue which seems kinda off.
Also on the backside around VRM there is some darker spots, but doesn't seem like it's been burnt, is this normal?

Any ideas how to troubleshoot further?

[stj]

Re: RTX 2070 troubleshooting

check if any mosfets are shorted,
if not then get a schematic - probably on this forum.
then start checking all the voltages to see if any of the regulators are dead

[madverkus]

Re: RTX 2070 troubleshooting

check if any mosfets are shorted,
if not then get a schematic - probably on this forum.
then start checking all the voltages to see if any of the regulators are dead

All of the mosfets seem to be good.
That one coil I did mention in the post wasn't also short, but just a low ohm reading, around ~10 ohms.
Checked all the voltages and since 5V is missing the whole minor rail is missing, measuring only the 12V.
I think the next step would be checking the enable signal from 12V to 5V?

Just have to first figure out where to measure it

[stj]

Re: RTX 2070 troubleshooting

a coil at 10ohms?
a coil should look like a short.

[madverkus]

Re: RTX 2070 troubleshooting

a coil at 10ohms?
a coil should look like a short.

This is not exactly the same board but getting very similar readings, in the original picture I posted of my GPU it's the lower coil near PCIE connector which is giving 10ohms