IPhone 3gs white screen after replacement?

Basically… My iPhone was completely smashed. And one day the glass started falling out and the touch screen didn't work and stuff. Then i replaced it myself (wow) and it had this white screen… Then it started randomly working and i was like yay. But it had white lines on it and it was getting more and more white lines so i was like… Maybe the LCD isn't connected properly so dissabbled it and lost 2 screws (unlucky) but anyway put it back to together and oh a white screen… The home button doesn't work atall so i can't turn it off or do anything
any ideas?
ty x

Do you agree with generalization?

-apple (iEVERYTHING/MAC company) doesn't sell products, they sell a lifestyle.
-that lifestyle is usually yuppy/hipster/artist/'i use my iPHONE while wine tasting to do important suit and tie work' type of lifestyle
-apple doesn't want people to customize because apple wants the consumers to conform to everyone else who owns an apple product.
-apple believes most of its consumers are too dumb or don't care enough about individuality to customize their phone (when apple released the iPHONE 5c i was shocked that they allowed customers to CHOOSE AN OPTION! (albeit color only)
-apple likes pi**ing off new customers that came from android/microsoft/linux by making you do EVERYTHING thru iTUNES or at the very least have to constantly sync and never offering free apps or music that are worth having in the first place.

needless to say i tried an iPHONE-S out this weekend/week and… Wow, just wow, was it one horrible experience.

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There's No Visible Damage, and I got the normal camera working, but every time I try and use the forward facing camera the app freezes. This same problem occurs on All camera apps, the front camera is not accessible… Help?

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Can someone explain why this is?

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