Solved Fan Constantly Running At 100 Desktop Pc

Chosen Solution

Hi all, I have a Lenovo Thinkcentre model 10AW008FMH and the fan is constantly running at 100% It happend suddenly i left the office for the day and came the next morning to it doing this, it never happend before and it is highly annoying for me and other colleagues so i can’t use it. I hope someone has the solution for me Cheers.

Hi @nixni , Try this and see if it works: Power down the system Remove the power cord from power supply. (power cord from PSU to AC wall outlet) Remove CMOS recovery jumper(#17 in image below - note its’ connection) Remove CMOS battery (#24 in image below) (note the orientation of the battery) Hold power button for 5 seconds Reconnect the power cord to the AC wall outlet. Power On computer and then hold Power again to Power off Connect CMOS jumper back the way it was Replace the CMOS battery back correctly Power up (system may beep twice) Press F1 for BIOS Set the BIOS to the default settings Set time and date Press F10 to save BIOS settings and exit Check if the fan is still running at 100% continually. If it still does you have a motherboard problem, possibly the temp sensor thinking that the CPU is overheating but it could be something else ;-)

Image taken from p.72 of the service manual for your desktop. Click on image to enlarge for better viewing