'Battery Alert' appears before the 'press 'ESC' key for Start-up menu.', however, ' Cooling Fan Alert' appears after 'press 'ESC' key for Start-up menu.'

Amazon: http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=Isopropyl+alcholo

Must be at least 90% or better alcohol content. Lower than 90% means it may have too much water in it and will not dry quickly or properly.

Thanks a lot,

Could you please address these final  points for me to finish this problem?

1- Sometimes I have been encountering the error message below(first screen shot below) many times continuously, although the CPU temperatures are not high when detecting CPU with core temp( as shown below in second screen shot)

2-

I have been told by an advance HP community member that

The reason to get a new fan is precisely because you do not want to open it twice. Frankly the fan not detected error is really unlikely to be fixed by cleaning the fan. They are inexpensive and readily available. This is the fan you need:

For use only with computer models equipped with a graphics subsystem with 1024-MB discrete memory 641477-001

From H.P. for $72:

https://h20141.www2.hp.com/Hpparts/Search_Results.

From eBay for under $30

**http://www.ebay.com/itm/HP-Pavilion-DV6-6000-DV7-6**

Also, I have been told that 'In order to replace the fan you have to disassemble your old heatsink/fan unit and replace just the fan. This involves maybe a couple small screws, some copper clips and some thermal silver tape. The fan has to be aligned  and retaped perfectly so it does not buzz or rub when reinstalled and there is no air leakage. Only when you have the whole heatsink rebuilt with the new fan can you then clean up the old thermal compound and reinstall the heatsink' 

However, I am asking here that  the fan to be purchased from the Yemeni merchant is just a single fan(NOT an entire cooling system assembly), and The seller said that it is a replacement for my OEM fan and will not offer a refund if it does not work. Also, I don't have any copper clips and some thermal tape. All what I have now is a fan, and thermal grease.  So, do you think that it is worth a try to purchase the new fan with $50 from the Yemeni merchant(I.e. do you think that only the new fan will fix the problem with my temperature and error 'system has detected that a cooling fan is not operating properly' appearing to me in the first start).

3- Note: that some thermal tape was torn  while removing the old fan from the heatsink, I found there was thermal tape which was torn. That material is easy to be torn. Can l find another one to reuse it while bolting the new fan in the heat sink.. (look in the screen shot below)

only a piece of that thermal silver tape that was torn. In particulare, the the end coming from the top end of metal plate and spanning the fan was torn. The end of that that tape stuck to fan was torn.

i would like to determine where the thermal tape which was torn while removing old fan from heatsink. The thermal tape is shown specifically in the thing/ object shown in the left side of the very top end in the screenshot below.

That tape is just thick adhesive used to help stick the fan tight with the metal plate. I couldn't find like it. Yes the fan can be bolted in the metal plate again even without that tape. However, i am expecting that tape would help stick fan tight with metal plate, so no air leakage will be.

4- To replace the fan what does this involves me?

I know these requirements:::

 a couple small screws, some copper clips and some thermal silver tape, and **** Isopropyl Alcohol. ****

However, What else is involved? What is cloth or oily film that does not leave any lint ?

Amazon: http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=Isopropyl+alcholo

Must be at least 90% or better alcohol content. Lower than 90% means it may have too much water in it and will not dry quickly or properly.

Thanks a lot,

Could you please give me the link of the right one hoping to purchase it?

I don't think either of the two you listed will work.

3- ISOalcohol can be known/familiar to a doctor? Or there are some other names. In my country, I don't think that ISOalcohol is know with English term. Maybe it be the same in the market but with another Arabic name.

It's used to kill germs in a cut or scratch. Also used to relieve body aches or pains by rubbing it on your body.

Some other possibilities: http://www.tomshardware.com/forum/266798-28-alternative-removing-thermal-paste

Thanks a lot,

Maybe I will find a chance to purchase some items not available in my country from online sellers who can ship them to another country. But I am not sure. Even if I have gotten the alcohol suitable, I still don't have the new fan.

Anyway, I only found this brand of ISOalcohol 

1-Savlon (Cetrimide 5% chlorhexidine Gluconate 0.5% +n/v.n Propylacohol 2.84% Broad Specturm disinfctant Detergent & Antibacteria Solution. (However, I saw that alcohol percent is very low in the components of that bottle.)

2- medical Spirit  ( I didn't see any ISOalcohol in its components)