You can do two things, either one, you can contact technical support that specializes in 3DS to get them to fix it, or two, return the 3DS XL for a new one.
Blue screen when playing online
If you get a black screen after installing mods, then it is a compatibility or incorrect install problem. If you get a black screen normally, force an update and this will probably fix it.
If the black marks are dead pixels then you have to replace the screen you cant fix it.
you can not
That's the bluescreen of death.... Call computer company.
if the screen is black you cant fix it is an internal crack that spread to the external part of the phone.
Go to the Start Menu > Settings > Blue Screen of Death > Off
You can fix Wii Black screen without sending it into Nintendo by pulling out the plugs at the back, and re inserting them.
Tell The Kid To Fix IT
Answertake it to the best buy or call the company who make the mp3 player and ask it be fixAnswerif the screen is cracked, go to eBay or whatever and buy a new screen, and then you have to replace it. But replacing the screen is very hardactually, those are good ideas. here's another way to fix it. this is also the way i fixed my ds. you can go on to www.nintendo.com and you are able to ship your ds and have it fixed in about a week. but you might have to pay about 50 bucks or more... :(but they will also get rid of scratches. ;)
Macs don't get the Blue screen of death. Only Windows 95 to Windows 7
During the boot up screen, consistently hit F10, and a screen saying "Would you like to change blue screen of death settings." From then, follow the on screen instructions to fix your blue screen of death problems.