iPod Classic 80GB won't power on. Diagnosed this was a logic board issue.
Disassembled the iPod and Replaced the logic board. Used the 18 compartment sorting tray to keep track of the misc parts as they came off of the iPod. Very handy.
When repairing iPods take your time. Work slowly and gingerly as there are many fragile parts. If you are having difficulty some times it is a good idea to take a break and come back fresh.