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It does not go into SMC bypass mode. Does not switch between GPU's

I have disconnected all the peripherals, but it still has the same defect. I did this.

The mac shuts down in the middle of the startup and speeds up the fan. no logo. https://drive.google.com/file/d/1_emwpuHfBj-_yiIe8vpZZTW7Ili2OAdn/view?usp=sharing https://drive.google.com/file/d/1r49uI9a6Z8y93Skk9hIsPF5b4Idcl251/view?usp=sharing

Only by reballing the GPU or by replacing it?

In safe mode, the fan turns normally. In diagnostics mode, it says " no problems found ".

In safe mode, it works normally.

The board is perfect. The customer reports that he is using it and turned it off out of nowhere. The cooler suddenly speeds up.

The installation is not interrupted. When it starts for the first time, the Mac reboots. The installation was done over the internet.

When you are in the CMD+R screen the mac doesn't turn off, only after you install macOS.

Yes, I restore and then install Big Sur, but it keeps rebooting...

I have already restored several times the T2 in DFU mode, but no result, do you have any idea what it can be?

PPVRTC_G3H 3.35v PCH_CLK32K_RTCX1 0.360v PCH_SRTCRST_L 3.34v RTC_RESET_L 3.34v PCH INTRUDER L 3.070V PCH INTVRMEN L 3,25V PCH_DSWVRMEN 3,25V

PLT_RESET_L 0v, pulses 2.5V; When you trigger the SMC bypass the cooler turns and stops.

yes. yes. PM_DSW_PWRGD 3,4V; SMC_ADAPTER_EN 3,39V; PCH_DSWRMEN 3,25V.

PM_RSMRST_L 0,275V o pulse when SMC_ONOFF is triggered PM_PWRBTN_L starts high at 3.42V when triggering the SMC_ONOFF drops 0.355V Do not enter SMC Bypass mode

Please don't say that, this Mac was working.

It seems to be the defective SMC ?

Voltage / diode mode L3095 0V, no pulse / 0.530 L7130 8.58V / 0.148 L7520 0V, pulses 5V / 0.435 L7560 3.34v / 0.370 L7430 0V, pulses 1.179V...