The monitor does not work due to the BIOS, what should I do?

Question

Monitors

I changed something in the boot tab in the BIOS (like switching boot mode and boot priority to uefi) and after that the monitor stopped working. I have a laptop, the matrix is ​​broken. I tried to go blindly into the bios and press f9 + enter, f10 + enter, it did not help. Notebook lenovo z510.

Answer 1

Is the matrix off the motherboard? Usually, the external monitor is used by default in this case.
Or, as above, they already wrote a BIOS reset via ClearCMOS. Because efi through the battery can not throw off all the settings.
If it doesn't help - to the service for a matrix toss / flashing

Answer 2

on the motherboard, find the clr_cmos pads on the datasheet and close it, maybe the legs themselves at the bios chip will have to be closed - you need to google it.
Otherwise, close the BIOS battery for 30 seconds.
If it does not help, unsolder it and wait longer.
Everything is at your own risk.
Better - to the service, they have everything for this, they can even connect the matrix without picking the motherboard and reset the bios.

Answer 3

It's unlikely that this is related. Have you tried using hotkeys to select a monitor?