Power and charge only few seconds


I have an NS HAC-CPU-20 which is causing me great concern: after a furtive error message, it no longer wanted to turn on.
I changed the M92 so it starts up now but shuts off after a few seconds.
I tested the load to see what happens and I could see that the console absorbs 12v and 0.74A for a few seconds then drops to 0V 0A.
So I changed the 17050 which seems to be linked to this failure if I believe the various posts and videos but it doesn’t change anything.
Do you have any idea what it could be?
Has anyone had this before?

Thank you in advance and have a great day :slight_smile:

Interesting fact: I tried to start the console in RCM and it works fine under Hekate. I dumped the nand on the way.
It’s even stranger then…
Any idea please?
thank you