Downgrade BIOS F.29 to F.20 for HP pavilion 15 cx0047nf

[Alintsoa]

Hello, 
I was gaming on my laptop hp pavilion 15 cx0047nf and got a weird noise from my fan. I stopped and keeped playing games again after 2 hours and suddently got a bluescreen. Now there is a fan error 90B appearing everytime I'm starting the PC. 
Someone told me to update the BIOS on HP website. I did it, it was F.20 before and now it's F.29. During the process I heard that the right fan was not working. And the fans made the weird noise like during the game. 
Now the pc is not making any noise and I think that the fans are not working. Also, now, there is no air coming out through the air outlets of the PC. When I'm using the pc (opening photoshop and 5-10tabs of chrome), the pc gets warmer and the fans start(making noises like a fans, if you know what I'm saying). But now, the pc is getting really hot even if I did not start chrome or anything else. I'm opening 3 tabs right now and the GPU is on 80°C and CPU between 75-80°C(I don't know what is the normal temperature of my pc). When I feel it with my hand, it usually reach this temperature when I'm gaming or opening Davinci or when using Photoshop for more than one hour. 

I'm getting my pc cleaned tomorrow and disconnect the fans to see if this is working(that was people who got fan error 90B said).

1)But I'd like some help to downgrade my BIOS to the F.20 like before. I'm scared now like they are not working with the update F.29. In the HP website there is only F.29 update for this model of laptop. 
2)Does anyone know a HP software or a software can detect and check the activity of the fans, if possible, to control them manually(boost them sometimes, because this model does not have a button like other gaming pc to boost the fans)

Thanks in advance for your answer.