My first impression was that something was not working fine with the battery however I immediately changed my mind after using the laptop on the power pack and ending with the same result.

I booted into safe mode and left idle for some time and nothing happened however exactly after using the laptop with simple functions like word and other utilities the problem came out again by just switching off.

I gave a look to the event viewer to see whether there were any specific errors however I found none. So the problem must have been something else.

I decided to dismantle the laptop to have a better view of the problem.

• first remove any peripherals that can be clipped off like the battery the CD Rom, the hard drive.
• then start by removing the top speakers mesh as a whole. this has multiple clips so pay attention.
• Unscrew the keyboard and detach safely by also unplugging the ribbon cable slowly.
• Then you need to unscrew the screen screws from the back and top part to disconnect it entirely. Pay attention for the black and white cables that come from the WIFI network card.
• Unscrew the top screws of the top chassis and then flip over the laptop to unscrew the lower ones.
• Once this is done the lower part should come off also through un-clipping some clips from the front end.
• Once done the top part should come apart always pay attention to the ribbon cables of the various devices.
• Have a look at the images to get a better idea of the parts and screws.

Once I performed the dis-assembly I started a visual inspection mostly of the power section which did not have any negative results. Everything seemed in place.

However looking at the connectors of the CPU fan I found out that it was not inserted well in place firmly so with a finger I pushed it in place. I suspected that this might have been the problem since the fan never ever triggered not even at boot up. With other laptop it is very common that they power up the fan as a test as soon as the laptop is switched on.

So re-mounting everything in place and giving the initial power to the laptop I found out that the problem was all about that simple connector that was not in place. The fan immedaitely powered up and the laptop never suffered overheating again.