My daughter has an HP Pavilion DV6, that I have fixed the symptoms of a problem but would like to get to the bottom of the cause. The problem was that it wouldn’t start, when you switch on you can hear the fan, the led on the caps lock bilnks continuously, and the led on the wifi key is orange. (It is normally white when working properly.
Having trawled numerous forums including HP I could not find a resolution, many suggestions such as reset the power, clean the memory and slots etc etc, followed by loads of entries from people trying all of these without succes
I eventually came across a post that said he had fixed it by simply wrapping the laptop in a blanket, switching on, leaving for 20 minutes then switching off and on again. This post was followed by dozens of people saying this worked for them.