Get a new battery its probably your battery.
Same
if the screen is black you cant fix it is an internal crack that spread to the external part of the phone.
You can send your Samsung galaxy S 4 back to the manufactures for cracked screen fix.
You can send your Samsung S 4 back to the Samsung company to be fixed if you cracked its screen.
I have Samsung tablet screen flashing and cannot turn off
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
The following 4 ways can help you to repair your iPhone Stuck on Black Screen: 1.Fix iPhone Black Screen Problem with TunesKit iOS System Recovery Step 1, Connect iPhone to the computer Step 2, Download frimware package Step 3, Fix your iPhone 2,Fix iPhone Black Screen Problem by Hard Reboot 3,Restore iPhone to Factory Setting to Fix iPhone Black Screen 4,Seek for Apple Genius Bar to Fix iPhone Black Screen
Blue screen when playing online
1. the cheap way to fix the cracked screen is to buy a repair kit on eBay.2. yes go buy the kit on ebay to fix the cracked screen it would be cheaper
You can fix Wii Black screen without sending it into Nintendo by pulling out the plugs at the back, and re inserting them.