This condition appears unusual in that you seem to have covered the 
normal culprits without any improvement. I would assume that the BIOS 
and motherboard have not suddenly gone bad and I would assume that 
somehow the fan has developed an electrical problem that is not 
permitting the fan to be seen by the motherboard and/or BIOS. For a few 
dollars in cost and a reduction in  frustration, I would replace the fan 
and see if that remedies the condition.

Tom

On 8/13/2010 6:59 AM, Romario chipo wrote:
> The fan has not been replaced before. The fan came with the machine
> and it spins quite okay thats why I am amazed by this error message.
>
> On 12/08/2010, John Sproule<[log in to unmask]>  wrote:
>> Is this a replacement fan or did the original fan stop being detected?  If
>> it is a replacement fan, does it have the same number of wires as the
>> original (e.g. 3 or 4 wires) and is it plugged into the same fan header on
>> the motherboard that the original fan was plugged into?  Does the BIOS have
>> a hardware monitoring section, and if so, what does it indicate about the
>> CPU fan's speed?
>>
>> Hopefully, the answers to these questions will help diagnose what is going
>> on.
>>
>> John Sproule
>>
>> ------- Original Message Below ---------
>>
>> Date:    Wed, 11 Aug 2010 14:26:12 +0300
>> From:    Romario chipo<[log in to unmask]>
>> Subject: Fan cannot be detected
>>
>> I have a Compaq DX2300M that will not boot because the system detects that
>> the Fan is not running. In fact the fan spins and an error is posted just
>> after the post: Fan cannot be detected. System is shutting down to prevent
>> the PC from damage. I have disabled the automatic detection of fan in the
>> CMOS but this does not solve the problem. I even reset the CMOS battery but
>> to no avail.
>>             
>

         PCBUILD maintains hundreds of useful files for download
                     visit our download web page at
                  http://freepctech.com/downloads.shtml