...or possibly the entire motherboard.. Since most laptops use an integrated graphics card, replacement usually isn't a real option.. If a second known "good" monitor doesn't get the job done, then either major repair or a new computer are the other real options.
Hope this helps.
I have a laptop that is several years old. The screen has since died, and I have been using a peripheral monitor in order to use my computer. The monitor was old and clunky but worked fine. However, I attempted to boot up my computer the other day, and I did not see anything on the peripheral screen. I didn't think much of it. However, for Christmas, my parents gave me a new monitor. I hooked it up, and again nothing came up on the screen. I tried every trick I know (the function keys, etc). One of them switched back and forth between having a signal (albeit a black screen) and a flashing "No signal" message when I pressed the button to swap. I can't go into the "settings menu" that you access by right-clicking the desktop, because I can't see the screen to know that I'm doing it right. I don't even know that the computer is working and not just in a "black hole of doom" setting. There is no reason I can think of that the computer would not be working; I am fairly sure that it is a problem with the monitor setup. I am willing to try both, however. I have access to another monitor if need be, although the monitor I am using is brand new. I also obviously have access to another computer, both a laptop and a desktop. I am unfortunately not horribly computer savvy but I can follow clear directions easily and I have a father who is rather computer savvy How can I mend this situation? Thanks so much!