Hi.  I have a E4310 laptop that has recently been giving me an boot error of M1001 saying there is a fan malfunction.  Looking in the BIOS I see several instances in the thermal section saying that Fan 1 has stopped.  When I get the error code on boot, I am able to hit F1 to continue the boot.  The CPU fan seems to be working ok (eg I hear it running and hot air is coming out of the vent).  The BIOS is current. 

I presume the CPU fan is about to give it up and will need to be replaced but am leaving this post just in case I'm missing something else.

Thanks!