My small cousin was given a PowerBook G4 laptop, and brought it to me to to connect to the the WiFi. It didn't let me connect, and so I connected the laptop with an ethernet. I tried to update, and figured I had enough time to update it. The battery said there was an hour left, and my cousin didn't have the charger. When it was updating it turned off! Now it doesn't boot. It's stuck at the Apple at the beginning. It's probably corrupted. What should I do now? :/