Asking for help to recover a no bios t420

[Trexie]

Hello guys, i have a t420 with 1.46 bios from oleh, i received a memory management bsod and decided to modify my memory settings, i dont remember much from the memory management screen but i changed something from static to adaptable and from 3gb to nothing in other settings also on that screen. After that i saved the settings and rebooted, but now i dont even get to the thinkpad splash screen, and i stay on a black screen forever, how can i recover the laptop? All lights and the two drives work when i start the computer but nothing else. I have 16GB 1333mhz of ram from sun memory.

Thank you for your help.