I'll refresh the old topic as I have a similar problem. My G53sx started playing up few weeks ago when my cat decided to knock the table offff..... Laptop of course ended up on the floor and the black screen occurred. However the Windows was loading because I could hear the sound and I could even log in to my user and so on. Then after 2 days the issue fixed itself. Screen was working fine for a few good days and then again BLACKNESS! After dismantling everything and having a quick scan of the cables etc I managed to get it up 😉 So I can see things now and my Windows is fine and all that BUT.... It seems that my screen is black on boot up. I can't see Asus logo or access BIOS or do anything for that matter. The first thing I see is the mouse cursor when Windows is loading but nothing prior to that. I checked the BIOS version and got 203. But after reading there are some issues with 209 version I feel reluctant to install it.
Any ideas of how to fix it so I can see BIOS and so on?