Dear WAMUGgers

About a week ago my G4 PowerBook 15" 1.67 10.4.8 developed a distressing habit. It won't run unless the power supply is connected. If I remover the power, it immediately shuts down and the date/time reverts to 1970. It may also require a 'forced' restart to get it going again. It has a new battery, replaced under warranty in December 2006 and MiniBatteryLogger (a nice app I read about recently to trouble-shoot wayward batteries), tells me it is close to perfect. I've tried resetting the Power Management Unit (PMU) as per Apple http://docs.info.apple.com/article.html?artnum=14449 but that made no difference. Any ideas before I send it off to the Apple Doctor?

Reg