Compaq fan not detected

[System_576]

I recently launched the HP hardware diagnostics on my laptop. I was confused when the program showed no fan connected under the system information tab. 

The fan is audible to me ( I think working well ) but not detected by the system. The system sometimes even shuts down due to lack of cooling. Please help me out .😥

[iomare]

Hi,

Can you give the exact model or product number of your CQ57 as there are many series and each series will have many models.

Here is link to support page showing how to find it:

https://support.hp.com/my-en/document/c00033108

Let me know,

David

[System_576]

Thanks David 

( well sorry for a late response ) 

the exact model for my laptop is :- 

Compaq Presario CQ57-408TU Notebook PC 

[System_576]

Any solutions...... hp community Please help me out !! 😐

[iomare]

OK. Are you getting errors at startup about the fan?

What you can do is replace the fan or even the whole heatsink/fan assembly and at the same time put some new quality thermal paste on the CPU.

The part number for the fan (and heatsink) is 646181-001

You can try finding with online search with part number

Examples

https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=646181-001&_sacat=0

https://www.amazon.in/s?k=646181-001&ref=nb_sb_noss

On page 76 of the service manual, you can see the steps to replace the fan/heatsink. Yours is the "Intel Pentium processor and a graphics subsystem with UMA video memory"

http://h10032.www1.hp.com/ctg/Manual/c03137362

Let me know if you need further help,

David

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Edit:

Just wanted to add you need to clean off the old thermal paste from the CPU and heatsink with a lintfree cloth and some alcohol You can use Arctic MX4 or similar. You will also most likely need to replace the thermal pad on the other chip, so you will need a thermal pad.

https://www.amazon.in/s?k=mx4&ref=nb_sb_noss_1

https://www.amazon.in/s?k=thermal+pad&ref=nb_sb_noss_1

[System_576]

Sorry David ,

I dont see any error message regarding the fan. (during bootup)

|| Can you please tell how can I judge my fan using the hp tools?

\\ I dont understand why you asked me to get my fan replaced?

Thanks David   🙂  🙂

[iomare]

Hi,

The fan is not detected by HP diagnostics but it must be detected by the system or you would get an error code at startup. Check in BIOS if POST error stop codes is maybe turned off.

If your PC is shutting down because of heat, you will need to clean the fan and most likely replace the fan, thermal material which would probably give some new life to the cooling system.

Regards,

David