HP Pavilion Dv6226US OS/Software :: Updated BIOS - Now Fan Doesn't Seem To Work Properly

I have an HP DV6226US and I recently updated the BIOS to the F.2D version (from what I remember as F.14, and that BIOS version F.14 is not listed under the previous versions in the download section). I am running vista 32 os. F.2D is the version that is given for my model of computer on the HP software and drivers site. When I ran the updater, I remember it saying it checked compatibility before the BIOS flash and that it was the correct one. I do however have a T2250 intel processor rather than a T2060, which was the processor that my laptop was supposed to come with and I don't know if that would have any effect on which BIOS update I truly need. 
 
Here is my question....
 
Before the flash the fan used to run constantly with obvious varying degrees of RPM's. After the flash, the fan doesn't seem to come on at all. It turned on once when I restarted the computer (right before it started loading vista). Other than that, I can't here a thing. However, I have used HD Tune and a very simple CPU monitor to see what kind of temps the internals are running at. My HDD (WD scorpion black 7200rpm 320GB) is running at constant 46c to 47c. Well within the manufactures specs, even under scans of the 200+gb loaded onto it. The CPU cores seem to be well within manufactures specs as well. Is this change in fan behavior due to the BIOS update, and if I should be concerned about the seemingly lack of fan activity. I use this laptop for DJ and Karaoke at 4 to 5 hour intervals about 5 days a week, and require that it not overheat.