My laptop only boots after 2,5 hours. I'm looking at a black screen when I turn on my laptop.
When I wait 2,5 hours the laptop boots into windows. I've checked all my connected hardware to make sure they weren't faulty.
I've disconnected the drives, installed new memory banks, removed the wifi adapter and display. When I removed the display I tried booting using a HDMI external monitor.

Everything I tried did not work. I think the BIOS might be corrupted so I want to flash an older bios version to see if that works.
When I try to flash an older version it gives me an error saying that "a newer version is already installed" and it will not continue.

Is there someone at Toshiba who can help me fix this laptop?

Thank you in advance.