Cpu fan error

[abhaya]

Dear sir,
when i start my system i saw in my monitor screen "CPU FAN ERROR " . then at-a-time 3 beep sound listened. then system was on . then after 1 minutes it was turned off automatically. please kindly solve my problem.

 

[abhaya]

Dear sir,
i am confidently sure that the fan is insert correctly.

 

[jimmysmitty]

DOes the fan spin when you turnt he PC on? If it does, is it spinning fast or slow?

 

[abhaya]

yes the fan is spining fast

 

[jimmysmitty]

Is the heatsink properly mounted? Normally it turning off after a short amount of time means the CPU is overheating.

 

[abhaya]

dear sir,
oh yes there is just little amount of heatsink on the CPU. i think it is the actual fault.
many many thanks to you for your help.