Ok, so I had this first gen nano. I plug it into my laptop [it's only the mobo with the screen connected] and it shows the "harddrives dead" picture. The iPod with the sad face and Xs. Then it started charging and it was working. I soldered a battery back onto it and I put the clickwheel back on, but now it starts up and shows the apple logo, the backlight comes on, then it shuts off and repeats that. The logo -> backlight -> shutoff. And it does that endlessly.
What can I do to fix it?