Missing voltage on ZOTAC GTX 1050 TI 4gb coil - need schematic

[fab13]

Hello to all,

I have a missing voltage on this ZOTAC GTX 1050 TI mini card (circled in blue)
I have all my other voltages strangely but the missing one goes up to 0.04 V and measured in Ohm 45 Kohm I find that really high and I expected much less than that.
0 SHORT circuit on the rest of the board
GPU heating and voltage at the coils 0.80 V which is normal for this type of card logically.


Without a schematic it's quite complicated and long to look for.

Do you have an idea?
I checked all my components seems present and checked in 2 times with the microscope and no missing.

With the thermal camera nothing heats up except a 2 Kohm resistor (noted 30B) but I find well my 12 V on one side

Many thanks in advance,

If you need more pictures I will send you some if necessary

[fab13]

Re: Missing voltage on ZOTAC GTX 1050 TI 4gb coil - need schematic

Photo

[ductranvinh]

Re: Missing voltage on ZOTAC GTX 1050 TI 4gb coil - need schematic

u need check some voltage level:
12v,5v,3.3v,1.8v,1.05v boot, 0.9-0.8v gpu, 1.5-1.35v ram

[fab13]

Re: Missing voltage on ZOTAC GTX 1050 TI 4gb coil - need schematic

I was able to test the rest of the system, I have my voltages up to the GPU.
This coil L11 is surely the missing 1V voltage.

I could point with the probes and see where it is powered and it seems that it is powered by a Q4 transistor which is probably a PNP transistor (Test positive probe of the Base and
black probe on Transmitter = blocking
Test positive probe from Base to Collector = blocking
Positive probe test from Collector to Base = on, i.e. approximately 0.610 V

So I replaced by an equivalent transistor and I could find 1,09V

Now when I turn on the card the display port is now recognized but black screen and HDMI

Maybe the wrong transistor installed? or insufficient voltage on this L11 coil? I could measure now 1.09V
I am doing wrong?

See the pictures

Thanks a lot =D

[ductranvinh]

Re: Missing voltage on ZOTAC GTX 1050 TI 4gb coil - need schematic

L11 is coil supply voltage for Fan! Haiz! First check and find 1.8v coil

[ductranvinh]

Re: Missing voltage on ZOTAC GTX 1050 TI 4gb coil - need schematic


Same same 70% and good luck

[fab13]

Re: Missing voltage on ZOTAC GTX 1050 TI 4gb coil - need schematic

Thank you very much, that's the 12 V Fan

The 1.8 V is present on the coil
And the fan is rotating at maximum from the start

Or do I have to look at another Enable signal?
Display port detected by the screen but not the HDMI and black screen.

I have my 1.5V VMEM and 0.80V on all GPU phases
Also my 3.3V on the bios powered correctly as a whole.

I have no idea lol