Laptop: Toshiba Satellite S55t - B5260 MOBO: DA0BLNMB8D0 rev D After replacing video cable to a fix black screen issue on...

Issue solved by making some educated guesses on what the code might be. It was " ". Seriously, 4 spaces, that's what it was. Lesson learned I guess, after buying a laptop check the bios/supervisor password immediately to see if there is one, then get it using tools that can only work when you can specify the boot order / get to the OS.