Iphone 4 screen won't turn on but phone works?

I recently got a free used iphone which a friend of mine gave to me because he said it didn't work. The phone's screen won't turn on but it still charges and you can still hear the noises it makes when you turn it on and off. I tried connecting it to itunes and reset it completely to factory settings. It still doesn't turn on but everything else works. What else can it be? What can i do?

Can I get these iPhones activated with AT&T?

So I bought 2 iphone 4's and 2 iphone 5s's all of them are SIM card and will be activated with ATT so when I take these to the store what is gonna happen? When I looked up the imei it said not black listed and it said "activated" what's that mean? Also I tested the phones by using my friends SIM card who also has att and they connected just fine.

What else do i need to do? Iphone 5 'invalid sim' problem?

Done these:
1.Update your iPhone to the latest version of iOS (7.1.1).
2.Toggle Airplane mode On and Off. (doesn't work)
3. Try turning iPhone off and then on again. (works for a minute)

i recently replaced my sim to a nano one. And asked them to turn the gprs off cause it spiked my bill

Can an iPhone 5s be factory unlocked?

I brought the phone off instagram I searched the imei number and it came back clean but when I got the phone it say it's locked to a email address that the person doesn't know. What can I do with the phone?

Why do young people today have such terrible grammar and spelling?

I'm 14 and my grammar and spelling are spot on, if I use improper grammar or spell a word incorrect, it is because I was typing too fast and IPhone did not correct it. Why do other people my age have such terrible pronunciation, grammar, an spelling? Can anyone tell me? For example, they don't know the difference between "your" and "you're". They say "drownd" instead of "drown". And nobody I know besides myself is a good speller. Can someone help out here?

How to ship my ebay package?

Ok so I sold an iphone on ebay and i went through PayPal and payed and printed my shipping label. Now I was just wondering what box I put the phone to ship in? Just a random box at my house or a flat rate box at the postal service

Forgot iPhone passcode, unable to turn off Find My iPhone, how do I get into iPhone?

My dad recently had a stroke and has resulting memory loss. He's starting to regain his cognitive functions and wants to use his iPhone to respond to the people who have been texting him, but he can't remember his pass code. I tried restoring his phone but it says that I have to turn off Find My iPhone to restore it. I tried going into iTunes to delete the app, but when I press "Remove," the button then says "Will Remove," and when I try to restore it, it still tells me to turn off or remove Find My iPhone. Is there any way to restore it from here or am I going to have to take it to the apple store and have them work on it?