HP DV7 4020sa Fan Noise - Cleaned and still making noise

Hi.
I need help with my laptop. It's a DV7 4020sa.
Ever since I purchased the laptop (used) the fan has made a horrible whining sound. I decided to fix it today so dissambled the laptop and gave the fan a good clean, and also put some wd40 on the fan spindle.
Unfotunately after reassembling, the fan still makes the noise. It strange because if i pull the screen/lid slightly towards me it stops the noise, and also if I apply pressure on the underside on the base where the fan is located.
Should I buy a new/refurbished fan to replace it or is there some fix i can apply myself?
Thanks in advance
This question was solved.
View Solution.

You're very welcome.
That is great news, and it was way less than a new one. 
You can't beat that!

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