crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

Sounds like either a bad AC adapter or bad DC-IN port.  Here's the pinout with voltages for the AC adapter:  http://faqintosh.com/risorse/en/guides/hw/ibook/pjack/

crwdns2915684:0crwdne2915684:0:

open