Laptop fan comes on and stays on after shutdown

[TheDrew]

Hi all

I have a HP Probook 430 G6 on which the fan comes on and stays on every time you shutdown. No lights, just the fan.

Steps taken/tested

1. Does the same on charger and battery
2. does the same with or without battery
3. Power supply tested, it's OK
4. Ran hardware diagnostics, all passed
5. disabled fast boot
6. Reset all power options in windows
7. Set PCI Express/ Link state power management to OFF
8. updated bios
9. Swapped ram around and out with other sticks
10. Does the same with or without SSD
11. Updated all drivers
12. Updated display driver
13. Updated IME
14. Rolled back IME
15. Disabled IME driver
16. Uninstalled IME
17. Uninstalled Intel rapid storage

Any help or advice would be welcomed. 

[Dave473]

I recently got the same problem on a ZBook. Do you also get overheating after shutdown? If so you might want to try the Ubuntu fix here https://h30434.www3.hp.com/t5/Notebook-Boot-and-Lockup/Fan-continues-to-run-after-shutdown-it-causes...

Did you get Microsoft update KB4023057 just before your shutdown problem started?

Do you get the same problem if you put the laptop into Sleep mode? I do, so I set Control Panel/Power Options to 'put the computer to sleep'=Never.

I also tried most of the steps you took. 

Some other suggestions I  saw:

"turn on Intel Virtualization Technology option in BIOS". I previously had this option in my BIOS but in the latest version from HP I see no option.

"Check BIOS/Advanced/AMT config". I see a BIOS message "Wake on LAN from S3 has been disabled because Deep Sleep is set on". I used to have a "Deep Sleep" option in my BIOS but it has disappeared. 

"uncheck the powerdown option in the Management Engine Interface (version 11.0.0.1155)". But when I use 

Device Manager/ System Devices / Intel Management Engine Interface, there is no "power management" tab with such checkboxes (even if I run from elevated command prompt). 

[TheDrew]

Hi Dave473

Nope,  luckily no KB4023057 updates for me. 

I've tried every thing you've suggested as well, but the fan still keeps going. 

Under Device Manager/ System Devices / Intel Management Engine Interface I do have the power management tab with 2 options: "Allow the computer to turn off this device to save power" and "allow this device to wake computer". Neither of these 2 make any difference to the satiation.

I starting to think it might be a issue on the Motherboard itself. Guess I need to move on to checking mosfets and voltages.