iPhone doesn't show up on any computer
iPhone 3g 16gb Black
i got an iphone from a friend and doesn't show up at any computer. he said he just clicked "reset all settings". iphone boots up with apple logo, nothing more.. and restarts itsef like every 5 mins.
it charges when i connect to the computer but doesn't show up at the computer
i tried with different computers and cables, other iphones shows up at the computers but this one doesn't. i changed the dock part (from another 3G) but still have the same problem.
with recovery mode (home button and cable in) recovery logo appears on the screen but doesn't show up at any computer
on dfu mode didn't show up at the computer either (i think i was succesfull putting into dfu mode, because apple logo didn't appear when i connected the cable or pushed the start button
Why would that be?
i know it is too much to read but i just wanted to be specific
Is this a good question?