Mac Mini Early 2006 Problem

[unrealSpeedy]

Hello,

I have a Mac Mini 2006 (Mac-F4208EC8). Some month ago I upgraded the machine with an Core 2 Duo, 4GB of RAM, a SSD and Yosemite. The Mac was running without Problems (except the lack of graphic acceleration) as an office computer till last week.
Now I have strange Problems with the Fan.I have changed nothing but since last week the Fan isnt working anymore pretty much all the time.
I tried to set the rpm with tools like smc and macs fan control - no result.
I have resetted the PRAM - no result.
Than I opened the Mini, disassembled till I reach the CPU. Than reassembled.
Restart, and the Fan works.
But after the next restart fan is not working anymore.

What kind of problem could this be? Is this really a hardware failure which I can fix with a new fan? Or isnt it worth the new Fan, since there is probably a logicboard failure?

Maybe there is someone with experience with the same problem, thank you!

 

[adam9c1]

Download TGPro full version trial from creator (not from Apple Store).

Check if any modules are running hot.

You can also force fan speed.

Is it possible the bearing on the fan has gone bad?

 

[unrealSpeedy]

Download TGPro full version trial from creator (not from Apple Store).

Check if any modules are running hot.

You can also force fan speed.

Is it possible the bearing on the fan has gone bad?

Thank you very much for your reply!
I am now working with the machine again, Fan is working.
I have detected a very curious problem:
If I start/restart the mini, the fan will be at 0rpm for at least a minute or more.
The Temperature increases sometimes till over 100 degrees (celsius).
The problem is not tempreature related but time related, if the mac is idle all the time the temperature increases till 60-70 degrees and after one minute or more the fan starts working.

 

[JoelBolan]

it could be a problem with one of the two capacitors below the irfr5505 or the irfr5505

greeting from germany
joel