820-00840 / No boot / PP3V3_G3H Short to ground


Ok thanks for all this explanations.

all i know it's it is an oem charger an cable, but cable was partially ruined (needed to flex it in many ways to have signal on the board, that was done by previous owner. Can Suppose a voltage dropped to data line inside the cable) Since the beginning of my revival experience, i use brand new cable and oem charger.

U2800 seems to output correctly on second port, but nothing on first.
Is there an way or an order to test U2800 and PCH properly?

thanks again