Re: X1 Extreme gen 1 20MF GTX 1050ti code 43 in device manager

You're quite right I missed some rails. I watched only a few Louis Rossmann videos on youtube, so I'm not an expert.
After your suggestion, I searched again and I located the PEX rail - a very small element with a tiny coil (looks like a capacitor).

PEX_PWRGD 200 ohms and constant 1V
VCCGFXCORE_D 0.7 ohms and constant 0.8V (three coils and three DrMOS)
DGFX_PHASE1 PLA302 (coil) PUA302 (DrMOS) 0.8V 0.7 ohms
DGFX_PHASE2 PLA304 (coil) PUA303 (DrMOS) 0.8V 0.7 ohms
DGFX_PHASE3 PLA306...

Re: X1 Extreme gen 1 20MF GTX 1050ti code 43 in device manager

On idle laptop draws 30 watts - unusable on battery. So I decided to turn off faulty GTX 1050. I located GPU_PWR_EN on U3802 element and I cut 4th leg (GPU_PWR_EN_D). After this on idle laptop draws 4-7 watts (over 16 hours on battery). No more NVIDIA in device manager and no more code 43.

Re: X1 Extreme gen 1 20MF GTX 1050ti code 43 in device manager

VCCGFXCORE_I is for Intel Graphics it's 0V because its not heavy used on Windows desktop. After a run Furmark on UHD 630 I see 0.9V on PL9001 coil, so its everything ok.

Summarizing, I have proper volatages on all power rails, resistance is also ok. But GTX 1050ti max q does't work, error code 43 in device manager.
I exclude software problems (tested on windows 11 and ubuntu, both with clean install).
I exclude firmware problems (installed newest bios from lenovo and other firmware like intel...

Re: X1 Extreme gen 1 20MF GTX 1050ti code 43 in device manager

I found schematics for this board -> google "wistron lpm 1".
The missing voltage on coil PL9001 is needed for VCCGFXCORE_I. I must find a reason why VCCGFXCORE_I is 0V

Re: X1 Extreme gen 1 20MF GTX 1050ti code 43 in device manager

Another measurements:
Vcore 0.7ohm, constant 0.8V
Vmem: 140ohm, constant 1.35V...

Hello,

I have a laptop as in the title. It's working pretty normally except discrete GPU and HDMI port.
GPU failure happened during normal work (light load, browser only), no liquid damage.
I checked resistance and voltages on coils and only one looks suspicious to me. I mean this with 4ohm and 0V, I don't know what is the purpose of this coil (I don't have schematics).
What else I should check?...

Re: New Members - please post your introductions here

Hello!