I have a asus laptop K42JZ , core i380 M processor.
After updating bios, my cpu fan runs at full speed continuously,
I downgraded the bios to it's orignal state but it was no help.
I suppose that the issue came from below description, but not sure how to fix it.
Any suggest is awesome.
at page 20.
This type of issues are usually handled by the computer manufacturer through BIOS updates. At this stage, I recommend performing BIOS update to the latest version.
See here for BIOS updates for your computer model: