Workstation T3500 Front Fan Failure

Can anyone gimme a solution of that front fan failure message ?

the problem is : 

suddenly I fired up the pc and I got an error message " front fan failure " , I opened the chassis to check if the fan spinning as well or it's stuck and I noticed it's run normally after a few seconds the fan started to spinning fast only one fan spinning fast that connected to the front fan socket and making a noise I powered off the pc and restarted it to check again , the fan is working fine after hitting the power on , but the error message still exist , and the fan started to spin faster , even I tried to swap both fan sockets to check if the problem in the fan but it happens in the other fan to when I did connected it to the front fan socket , I gone into the bios setup and cleared the system messages but still the fan failure exist and the noisy of higher rpms fan also , I did searched a lot for a solution even I tried this article   https://www.dell.com/support/article/us/en/19/sln79964/fan-error-randomly-occurring-during-the-power-on-self-test-post-process-on-the-precision-workstation-t3500?lang=en

but it doesn't work for me , tried to reseat everything but the problem still exist , if anyone have an idea to solve it because I ran out of solutions ...