Z2 mini fan

[Kid-]

Hello,

For the past couple of months, there are many (15 cases in 200 PCs) fan issue of Z2 mini workstation.

Fan issue is that fan runs full blast when power on. 

We have Z2 mini workstation G4/G5/G9, and most of cases are G4 and G5.

I know that G4/G5 is old pc, they are working for 3,4 years.

But these issues are suddenly happened may cases from end of last year.

I don't know what is the trigger of these fan issue...

I tried to update BIOS to the latest version, 30% of issues were resolved, but other 70% of issues were not resolved.

I think that there are any root cause of issue, but I couldn't find it....(Monthly windows update??)

I contacted HP support if there are similar situations from other users, but support told me there is less issue reporting from other users.

Does anyone have the same situation? 

Regards,

[Kid-]

Nobody has the same situation? If so, it may be our specific issues...