Red Screen of half death

Now from FreeBSD laptop computer, sorry for my broken Englih.
When I try to start this laptop, the entire screen is red. Yes, I can read some messages, but everything is red. Ala, the end of poor LCD? I just enter the BIOS setting, and set BIOS to defaults, that is all. It comes OK again! I do not know the exact reason of this phoenomenon, but it works.
Now I write from Opera 7.11 linux compatible mode of FreeBSD, on WindowMaker desktop.