Iphone 4s gray screen of death?

I've had my iphone 4s for almost a year, and last month i had my cracked screen replaced. Just a few weeks ago this issue occurred. The screen turns gray with some green and red lines down it, and sometimes just white.i've done the hard shut down (holding home and lock button for 5 seconds) and after it shuts down, it turns back on but with the gray screen still. This was the first time it happened and i eventually stopped trying to fix it somehow and didn't touch it, and next thing i knew in a few minutes it was turning back on normally. So tonight it happened again- my phone died, so i plugged it in to charge. When i came back a few minutes later after it turned on from charging, the screen was white and the whole thing happened all over again. ( at the moment it is gray again). Its not turning back on and its been about 15 minutes and i don't know what to do… Any solutions? Thanks so much for anyone to help i really need it i'm freaking out (:

p.s.i've tried watching youtube videos etc. And none are helping lol

Wake up and buy a Samsung.

This is not Apple problem because you got cracked screen/LCD replaced… Most likely you have loose LCD connectors or those guys took your original LCD and put fake while changing screen. All the above symptoms are LCD issues nothing else.

Check with the guys who replaced screen for you… May just some loose connector. But never heard of this issue on iPhones.

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