Xbox one series X no fan

[makretallica]

Hello , My console works just fine , the fan stopped working i replaced 3 fans now none works .
I measured the pins for the fan (as shown below) .
it seems weird that the pwm voltage is 3.3v while it suppose to be 5V .
i tried supplying 5V directly to the fan . Also nothing .
Can someone guide me to a solution or an idea of where the problem could be coming from .

PS : I changed the connector also nothing changed .

PIN 1 : GND
PIN 2 Main Power : 12V / 0.2916 in DIODE MODE
PIN 3 (TACHO) : 2.09V / 0.9725 in Diode Mode
Pin 4 (PWM) : 3.3V / 0.5148 in Diode Mode

Thanks .

[LaPCon_IT]

Are you getting 12v?

[makretallica]

Yeah am getting 12v i already shared all the measurements .

[spleenharvester]

I'm not well versed on the XSX but used to work in one of Sony's facilities producing their certified refurbished consoles. We'd get these on rare occasion, voltage present but no fan spin. If I remember correctly it was usually an APU fault or a southbridge fault.

[stj]

did you take the voltage reading between pins 1 & 2 with the fan connected?
if not then try it - it may be dropping out when there is a load