I managed to disassemble the laptop and remove all four RAM sticks, hard drives, CD case and put them back in. Usually does the trick. But everytime I put it to sleep or shut it down, I end up not having any activity on the screen despite it booting up.

I've tried opening it:
- with just one hard-drive: sometimes works
- with or without battery: never works unless I do more such as removing some stuff
- without the battery: works 40% of the time
- while all components (RAM, Hard-drive, CD Case, speakers, mentioned above is removed, turn off then put just the ram and one hard drive: usually works 40% of the time

one of the times that I manage to turn it on, and did a realibilty check, it only showed failed boots without any other signs that a specific component has malfunctioned

I've also done perfom /report and found everything passed except system service check which I presume is due to he repeated forced power off I do whenever I only get a black screen.

I've also done a hard drive check and status are all green. anyone know what else I can do being installing a new bios or fresh reboot the last resort?