My Iphone 4 won't turn on - 2

Okay, So First, when my Iphone 4 looked completely fine, there was a slide bar that said "slide for power off" & then there's cancel, I tried clicking on cancel, but It didn't work, so I slid the power off bar. And From that time & on, I couldn't see my Iphone screen, I was like. Oh okay, I just have to turn it back on, but it didn't work. I can hear my notifications going on& I can hear my music, but the problem is… I can't see my screen. I tried to hold the Home button for a long time, but it doesn't work. It just won't turn back on.

Try taking it to best buy to let them look at it…

Plug it in to your computer and restore it

If you are hearing your notifications it probably means the phone is still one but in some weird lock state. Do a hard reboot by holding down the Home and Power button at the same time for 10-20 seconds and your phone should reboot.