Lapbook pro 8gb n4100 black screen help

hi i have a lapbook pro 8gb 256gb ssd n4100 Gemini chipset.
i changed something in the bios and i now have black screen, led’s light up, caps lock works, but i have no screen. have tried running batttery down, tried blind key press, no good. i need the bios reset instructions please

You shouldn’t have touched anything on the Bios, these are the consequences of modifying some parameter without knowledge.
I can think of a way to reset the BIOS to factory settings but you will have to open the laptop and disconnect the battery for about 5 minutes.
Then plug it back in and try turning it on.

Have tried this but to no avail. Still boots the same