I'm not sure this is the right place, but i couldn't find a sub forum for older Macs. I hope mods will move the thread if needed. I have a PowerBook G4 and the AC adapter won't work. I had this issue for a while now, but usually if I unplug it from mains for 60 seconds and reset the adapter, it works again. Yesterday it definitely stopped working, and nothing helps anymore. I tried unplugging it from mains, resetting the PMU, cleaned the connectors, checked cable for live wires, but no avail. Is there anything else that can be done before I take it for repair?