HP DV7-4020sa fan - cleaned noise and still make the noise

Hello.

I need help with my laptop. It is a DV7-4020sa.

Since I bought the laptop (used) the fan made a horrible squeaky sound. I decided to fix it today so dissambled laptop computer and gave the fan a good clean and also put some wd40 on the axis of the fan.

Unfortunately, after reassembling, the fan still makes noise. It's strange because if I pull the screen/lid slightly towards me, it stops the noise, and also if I apply pressure to the lower part on the base where the fan is located.

Should I buy a new/submitted fan new to replace it, or is there a fix I can apply?

Thanks in advance

Hello:

More than likely, the bearings of the fan are in ruins, and the only solution would be to replace the Fan/Heatsink combo.  The fan is not sold separately.

Your model equipped with a discrete video adapter according to the product specification, so you should be the Fan/Heatsink Assembly which, according to the maintenance manual, includes hardware replacement, intended only to computer models with graphical subsystems with discrete memory.  Part # 606575-001 HP.

It's quite expensive at $84.28, but I do not buy a used assembly (if you could find another one) and eventually encounter the same problem on the line.

http://h20141.www2.HP.com/hpparts/Search_Results.aspx?mscssid=00CD1EC2A53945949E211F17A82B64FC&SearchIn=PartNumber&SearchPN=606575-001

Sometimes this happens because users simply spray a jet of compressed air into the fan intake and exhaust air vent covers, which is perfectly OK, as long as you place a PIN or something that can get through the protection grid, between two of the fan blades to prevent it from turning.

It is not a contest to see how fast or strong you can do this fan to lament when cleaning, because that's how the bearings get ruined.  They are delicate and only designed to handle a certain RPM range.

One can only imagine how far beyond this tolerance range fan bearings can go, when they are subjected to a jet of compressed air of a jet!

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