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accidentally touched my hp elitebook system cooling fan, now it shows

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my system was working fine when i accidentally touched my system cooling fan while the system and fan was still running, and after that when i restarted my laptop it showed a message related to 90b error and the sammary of that massage was  

"your system cooling fan is not working (90b error), press enter to continue or the sytem will shutdown in 15 seconds, but  continuing may result the system to behave unexpectedly which could result in data loss or some other damage."

after that i chose to pressed enter to continue  and my system booted the windows correctly but after that when i checked the cooling fan i noticed that its not spinning anymore, when i start my i start my laptop my system cooling fan spins for 1 or 2 seconds and than it does not spin anymore but the system is working fine. 

here i want to tell you that i only touched the middle part of the fan, not the blades.

and my system is brand new and there is no dust inside it and i even tried the blower to remove any small hidden dust but the problem still remains.

my system specification are 

hp elitebook 840-g1 nootebook PC

intel core i 5 , 4th generation

ram 8 gb

hard drive 500 gb

ssd drive 32 gb


please help me out.. i'll be really thankful

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You might try and follow these HP steps to try and rectify the problem: https://support.hp.c...ument/c03620929

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