When starting up a laptop that was dormant for a while, there might be a System Fan Error Message and it will cause your device to shut off itself after 15 seconds to prevent danger to itself and you, the operator.
Luckily, this can be fixed within an hour with the right tools.
* Compressed Air (Dislodge dust particles)
* Toothbrush (Clean air vents)
* Tweezers or Toothpick (Keep blades from spinning)
* Vacuum (Remove dust particles)