I recently bought an iBook G4 1 GHz (1.25 GB RAM, combo drive, airport extreme, etc.) and a TiBook G4 (667, 768 MB RAM, combo drive) for 60 dollars. The iBook works perfectly. However, the PowerBook has a problem with connecting to the internet. It finds wireless networks, and can identify them, but it cannot connect to them. It also cannot connect to the internet when I have an ethernet cable plugged into the back. I have gone through the network assistant multiple times. I even re-installed a fresh copy of Tiger. I changed the date to today's date and time, to see if that would make a difference. No luck. The strangest part is..it can see wireless networks, but when I looked in the PCMCIA slot, there is nothing in it...it's empty..