I want to know if a 220/240 to 110/120 VAC converter with a 50 watt limit will work for my Mac PowerBook G4 portable computer.

That depends on the model – the fastest one used a 58W battery while the slowest model used a 50W battrery.

One needs a more powerful transformer – 75W or 100W will handle the Laptop.

How many watts does my PowerBook G4 draw?
How many watts does my PowerBook G4 draw?

I want to know if a 220/240 to 110/120 VAC converter with a 50 watt limit will work for my Mac Powerbook G4 portable computer.

That depends on the model – the fastest one used a 58W battery while the slowest model used a 50W battrery.

One needs a more powerful transformer – 75W or 100W will handle the laptop.

The computer turns on , then chimes and then apple and spinner appear. After 5 or ten minutes it turns on. Then a black/grey box appears and the screen darkens. It says to restart the computer. The pointer is frozen. I started up with hardware test CD and every thing checked out ok. What should I do?

It may be a bad hard drive.

Does anyone know how to fix a QuickSilver G4 Apple computer that will not start up right?
Does anyone know how to fix a QuickSilver G4 Apple computer that will not start up right?

The computer turns on , then chimes and then apple and spinner appear. After 5 or ten minutes it turns on. Then a black/grey box appears and the screen darkens. It says to restart the computer. The pointer is frozen. I started up with hardware test CD and every thing checked out ok. What should I do?

It may be a bad hard drive.