Years ago, my mother's old HP pavillion was overheating, so I decided to open it up and clean the dust from the cpu cooler and re-apply thermal paste. After that I vowed to never buy anything HP again.
It took me more than 5 hours to perform a simple cleanup task.
It's not much use giving us step by step instructions on how to service each part when it involves removing more than 60 different screws.
Those things were definitely not build to be serviceable.