Dell processor fan isn't working Error code: 2000-0511 validation:14622

I got a laptop Dell Inspiron N4050 15 months before. 3 months ago it gave me an unusual sounds, and it clearly wasn't working well.

Today I turn on the computer and it gives me a blue screen, So I tried the Startup Repair and it didn't work.

So I run the hardware test by using F12 menu on dell logo screen and check for error codes i found this on when testing reaches the fan processor.

Error code: 2000-0511 

validation:14622

Please can you help me? Thanks for giving me the attention and support