laptop Asus X54HR laptop fan always on at full speed

[RealPsygnosis]

Hi guys, two days ago I've bought on ebay this laptop (asus X54HR) for 70$ on bid (it has just the battery exausted and a replaced power connector). The Laptop fan goes full speed (4390 RPM) and always on from when I power on untill I power it down

the specs are:

• i3
• HM65 Chipset
• AMD Radeon HD 7470M

These are all my attempts:

• I try clean installation of windows 8.1 and 10 ltsb (no windows update driver install, 'cause it causes a bug with amd driver that shutdown the backlit with the lastest legasy driver)
   
• I install both the chipset drivers that Windows Update and the chipset driver that are avaible on asus website + intel management engine
   
• I try to install "notebook fan control" and the fan is at 200% but no way to lower it
   
• I try to install asus power4gear + ATKACPI package from asus website, 
   
• I try to mess with power setting, with all battery saving, and active/passive cooling.
   
• update to the lastest bios
   
• I disassembly the laptop and clean it, change the thermal paste (arctic silver mx) on CPU and GPU
  NOTE: based on some youtbe videos, I've notice that the previous  owner has removed the thermal pads from GPU and change it with thermal paste

SOME THINGS I HAVE NOTICE

windows correctly scale cpu power with the usage, in idle the cpu runs at 700Mhz (full speed is 2,33Ghz) and the airflow that comes out seems pretty cold.

 

HWiNFO64 shows temps from 32 to 44°C and the fan always at 4300RPM

(sorry for the photos instead of screenshot but I write from another pc).

https://www.4shared.com/s/fWpUjJls0ee

https://www.4shared.com/s/fxTNM6zjAfi

https://www.4shared.com/s/fBayH9f4Ada

 

Now, can the fan pwm broken? (the yellow pin seems fine)

Can be a problem with the missing thermal pads on GPU?

Can be another problem that I'm not considering?

 

Thank you in advace I'm really don't know what to do.

PS

Herse some extra pics:

https://www.4shared.com/s/fYyAiO2HLgm

https://www.4shared.com/s/fa9pkaqI7da

https://www.4shared.com/s/fPDeEirNnfi

[Overl0rd]

10 minutes ago, RealPsygnosis said:

Now, can the fan pwm broken? (the yellow pin seems fine)

Can be a problem with the missing thermal pads on GPU?

Can be another problem that I'm not considering?

From your description it certainly appears to be either a PWM or temperature sensor issue, but considering you can see accurate CPU temps it's more likely a PWM problem. Are the GPU temperatures reported accurately?

 

I also see that this machine originally came with Windows 7. It's definitely worth a try to install that together with the OEM drivers.

[RealPsygnosis]

8 minutes ago, Overl0rd said:

From your description it certainly appears to be either a PWM or temperature sensor issue, but considering you can see accurate CPU temps it's more likely a PWM problem. Are the GPU temperatures reported accurately?

 

I also see that this machine originally came with Windows 7. It's definitely worth a try to install that together with the OEM drivers.

Ty for your reply.
I don't know if CPU/GPU temps are accurately, but for what I see, I have a two digits temps, no strange numbers, so maybe they are correct...of course it's strange that a 33/40°C don't go lower with a 4300RPM fan.

I could try with win7, but  on asus website there are win8 driver so, on logic, also win8 should be perfectly compatible.