Acer aspire T3 715 CPU cooling fan not spin, how to solve it?

Kuen
Kuen Member Posts: 191 Mr. Fixit WiFi Icon

Have 2 T3 715 PCs on my bench top. PC-a is used daily. PC-b is used once a while, maybe 1 to 2 hours in 2 or 3 days. This has been for about one year. Opened today the case of PC-b for changing a storage-hard-drive, found the CPU cooling fan not spinning. Other things, keyboard & mouse and USB ports all the hard drives are all running normally.

What seems to be the issue and how to solve it, please?

Thank you.

Kuen