820-01041 video artifacts

[Djsp]

I have this MacBook that has these artifacts when turned on but it boots and the touchbar displays the choices I can't understand the lcd problem I tested it on another board and it works the only anomaly I found it on pp1v5r1v35_s0_gpu_mem that in diode mode 0.204 and on a working board it is 0.345 and maybe the vram

 

[2informaticos]

VRAM and GPU share both that power rail...

 

[Djsp]

I replaced the gpu but the result is slightly improved but the lines remain you see the loading bar but once completed the boot remains on the apple even if the touchbar displays the controls, or tried to replace the vram and the value of pp1v5r1v35 and returned the one similar to other identical cards but the result remains the same probably the problem is not only the gpu

 

[2informaticos]

Where did you get the GPU, Aliexpress?

 

[Djsp]

No, I really recovered it from another card with the proper proportions

 

[2informaticos]

Did you test in safe mode?
External video has the same problem?

 

[Djsp]

I can only get into this screen no external video

 

[2informaticos]

No image available there.
Missing external video is related with GPU...

 

[Djsp]

Practically it's the second UA000 same flaw it could be UA340 or even UA600 that don't do their job well

 

[2informaticos]

These shouldn't be the problem.
Don't you have all GPU voltages?