digitalwraith

If you still have the screen (even torn off), take it to an Apple Store. They can try replacing it, and if it works you only pay for the screen. If it doesn't work, i believe they'll offer to let you replace the phone out of warranty, but you can decline. So, -warrantied work and possible working iphone.

Actually Jackson, while i hope you mean well, if you're not getting any power, then the computer hasn't even passed the POST (Power-On-Self-Test). As such, no amount of gentle hitting will fix it. If the computer is running on only battery power, then possibly such an impact could re-seat the battery, but i wouldn't be comfortable recommending that.

I'm inclined to agree with Mayer. Unless there was liquid spillage, the magsafe board almost never fails. The down side is, if there was liquid spillage, a new magsafe will fix the problem... for all of 5 minutes. Then you'll need both a new logic board and magsafe board.

Simple first - try removing the power and battery. Press the power button for 3 seconds (shouldn't do anything). Then replace the battery and power. If it starts up, you're good! If not... Try removing the RAM (under the keyboard), and see if it gives you three beeps on startup. If so, try starting with only one stick of RAM, may just be failing due to RAM that's no longer any good. If you don't hear three beeps (or anything) on startup with/without the RAM... probably a bad logic board.

Top left screw in this picture isn't a torx screw, and should be left in place. The screw you want is a bit further down than the one circled.