A white screen may also occur if the device is dropped hard or banged against a hard surface.
The shock of the impact can make the screen go blank. So, how to fix that white screen when you encounter one on your very own prized iPhone? Let's find out.
Fixing of iphone white screen,follow any of the below solution
=>Try Jailbreak and then restore your gadget;
=>Try to do a DFU restore; If the white screen is due to BSOD or software issues, a few button maneuvers, DFU mode and restore can do the trick. However, if you dropped it and the issue is due to hardware damage (usually due to connection becoming loose), you might need to dismantle your iPhone, if not under warranty.
=>If under warranty, take it to an Apple service center to get it fixed. If your warranty has expired, then you need to dismantle your iPhone and find the stickers labeled 1 to 6.
=>Label # 1 is the LCD connector cable. If sticker 1 is not visible, then it is probably stuck to the screen and you need to pull it off the screen.
=>Re-attach cable # 1 to where it should have stayed.
=>Software or BSOD issues can be resolved by pressing and holding down the power button on top and the Sleep/Wake button in front at the same time. Keep holding
them down for 10-15 seconds and let the iPhone restart.
=>On restarting, the Apple logo should appear with a black background.
=>If it does, bingo! If it doesn't, you had better take it to an authorized service center or get it replaced if you're covered by the Apple warranty.
=>If you're getting gray lines on your screen, then probably the LCD is broken.
=>Using firmware might help in certain cases
=>Also, unplugging and re-plugging cables #2 and #3,
besides #1, might work and get your display back.
The common reasons behind a white screen are usually display-related as most of the time, other than the white screen, other applications like music, messaging, etc. work and the ring and vibration features of the iPhone are also found intact. Now that you
know how to fix that white screen of death on your iPhone, you are equipped to troubleshoot your beloved gadget yourself. However, to be on the safer side, I would suggest that you contact an Apple service center to get it fixed if you are still within warranty period.