Nasir Hussain Sep 28, 2007 16:12:26 GMT      
Here is a post I saw in another thred:

OK, here's the deal everyone. I got hold of an internal HP document (don't ask me how) which describes HP is aware of the problem, and best of all they have a fix!!

This document applies to HP Notebook PCs with Microsoft Windows Vista
The notebook PC fan does not shut off, runs in high speed only and creates a loud fan noise. The loud fan noise is due to the volume of air being pushed.

This is a "Fix-on-Failure" service event. Proactive service is neither necessary nor authorized.

If a notebook exhibiting this failure falls within the scope indicated above, is within warranty, was built between 4/1/2007 and 6/9/2007, the serial number range is between CNU714XXXX to CNU723XXXX, please set up a service event.

If a notebook exhibiting this failure comes in for service, replace the system board with the appropriate following spare part:
HP Compaq 6510b Notebook PC: SPS-BD SYS GM (DF) 446906-001
HP Compaq 6710b Notebook PC: SPS-BD SYS (FF) 446904-001
HP Compaq 6710s Notebook PC: SPS-BD SYS +WWAN(FF) 446905-001

NOTE: System boards with revision x.31 and above do not have this issue.
Recommended Action: Fix on Specified Failure

Hardware Platforms Affected: HP Compaq 6510b Notebook PC, HP Compaq 6710b Notebook PC, HP Compaq 6710s Notebook PC
Operating Systems Affected: Microsoft Windows Vista Business (32-bit)
Software Affected: Not Applicable

Service Advisory Document ID: c01106598

Quelle: HP Forum