820-3437 Fan spinning problem

[arash]

This board is back after a few months, with a new Q6060 it was working fine and now the problem is back, we have tried different Q6060 and the problem is persistent, any ideas?
the voltages:
Pin1: 5.1v
Pin2: 1.63v
Pin3: 4,62v

This was the original thread:
https://www.rossmanngroup.com/board...4618-solved-820-3437-a-fan-spinning-very-fast

 

[dukefawks]

Directly fast on startup? ASD error? SMC_FAN_0_CTL voltage?

 

[arash]

No Title

SMC_FAN_0_CTL is 3.3v and ASD errors are attached in the picture and yes directly on startup

 

[dukefawks]

Diode mode on SMC_FAN_0_CTL fan disconnected of course.

 

[arash]

It's 0 between SMC_FAN_0_CTL and ground in diode mode.

 

[dukefawks]

Well there shouldn't be a short to GND there! Not much on that line besides the SMC that can cause this.

 

[arash]

New SMC, same problem

 

[dukefawks]

Short to GND gone?