Found my wife's G4 cube in the garage the other day and booted it up. It worked fine, except that the PRAM battery must have been dead because it had forgotten the time. I then rebooted it and the screen wouldn't come back on. The screen's power light is solid amber, and I can hear the HDD when I turn it on, indicating that it is probably booting. I tried connecting a monitor to the VGA port, but that didn't work either. I replaced the PRAM battery with a fresh one and hit the PMU reset button under the GPU, but it didn't help. The power supply status LED inside the G4 cube is green. There is another LED next to the RAM that is red. Any ideas? Thanks.