I bought a used ipod mini 4gb on ebay, 1st gen. Add said it was fine, only problem battery went dead after 30min. So, I try out the ipod when I get it-the wheel was a bit sticky (not scrolling like it should), and battery didn't hold charge. I installed a new battery (3.7v-old battery was a 3.6V). Charged up battery, tried ipod. The wheel would not scroll, and soon after, the ipod shut off. Waited a few minutes, plugged in wall charger-the apple came on and the battery "Charging" icon was present. Unplugged charger, wheel still didn't work, and then ipod shut off. ORDERED a new wheel. Installed that..SAME THING...Plug into charger on bottom...the APPLE logo appears, then I am at the Language menu, battery icon showing charging, can "lock" and "unlock" and that icon shows on screen in upper left...I touch the wheel and the whole screen goes blank. I can't turn it back on. If I wait a little bit, I can repeat the whole thing. What's up? Please, help..I've spent more on getting a ipod and a bunch of parts then buying a 2gb nano. My hard drives seem to be fine, the screen too.