Toshiba C855D changed UEFI to CSM Blackscreen

ViciousIXIL

Commendable
Aug 6, 2016
2
0
1,510
hello, recently I wanted to throubleshoot my Toshiba satellite C855D. After I installed gpu drivers it would reboot and bluescreen.

So I thought it would be a good idea to downgrade from Windows 8 to Windows 7 to check if the system would still bluescreen. I changed secureboot to false and Uefi to Csm in the bios. After that I restarted the laptop and it would not give me any video, Just a slightly Grey lcd panel. (from powering the lcd i guess).

I have hooked an external display to it via hdmi and vga. Still no video.

I (think i) can get into the bios and discard changes and restart. By spamming f2, Pressing left, 3 times down and Pressing enter. Thats when the laptop reboots.

I have reseated the Ram, tried different ram, tried no ram. Tried another hdd, tried no hdd.

Tried to boot without battery, tried removing the cmos and booting via AC. Tried shorting the Cmos jumper.

What can I try next? Thanks in advance!
 

ViciousIXIL

Commendable
Aug 6, 2016
2
0
1,510


No, I believe that is not the problem. The problem started immediately after changing the settings in the bios