Are you aware if it works or not? If you have a external monitor or even a TV, hook it up with HDMI and press Win+P a few times until you get a signal (if it has windows installed) but I believe the BIOS might swap automatically also.
if you get a display out and make sure the laptop works, check the connection inside or look into a new display.
(If this doesn't work I don't have a definite fix, so don't believe anything if it fails, I only have some ideas, gl!)