Hi!
Toshiba sat M40 is power cycling every 15 to 20s, 6 times before shutting down, with no display.
GPU reflowed with no result.

Platform : 6050A2028701-MB-A03
Bios is phoenix.
Post code jumps directly from 00 to 86 and back cycle -6 times-.
Current reading rises to 1.1V and down to 0V.

Do you have any clue as where to dig ?
Is it more likely to be a power overload or a GPU fail ?
I wish to get advice from professionals.

N.B- Suggested in beginners forum to change the GPU.

Thanks for your help.

This is the forum FOR professionals not for beginners to ask professionals some annoying questions.
So if you want to get "magic" advice that helps you avoid the replacing of the chip - wrong address.
Spend your time for BGA station "creation", mohkam.