IBook G4 screen goes black, suddenly doesn't recognize input

Last night I was using my ibook in the usual manner, in the middle of sending a file to a friend, when my screen went black as if it were going into a screen saver, but wouldn't respond. The backlight was still on, but it seemed to be frozen. I force shut it down, tried to turn it back on. The backlight came on, and it seemed to be starting up, but no picture appeared. Tried again. The second time it didn't turn the backlight on at all, and wouldn't respond. I figured maybe it had just overheated. I let it rest for a couple of hours, then tried again. This time it went to the startup screen, and I figured it was alright and had just overheated or something. But a few minutes after I entered my password and it loaded my desktop and everything, it went back into the backlit black screen. I left it off for the night because I wasn't sure what was happening.
This morning I turned it on and the first time, the backlight turned on, but no activity. The second time, the backlight wouldn't turn on. Same thing the third time. Decided to try to boot off the install cd, and though it didn't boot from it, it started up fine and things seem to be working so far. I'm just afraid it's going to happen again. Does anyone have any suggestions?

Strop11
Welcome to Apple Discussions.
I've had to rely on keeping it plugged in for power for the last 2.5 years or so since my battery no longer holds a charge.
Please buy a new battery. You owe it to your computer and to yourself. Even though it will run when plugged into household electricity, that is not how the computer was designed to operate.
Also, if I look close enough at the screen, I can make out the desk top slightly; it's like the brightness is setting is way low, when it is actually on the brightest setting. The screen goes black in the same way if I leave the computer on, but unattended for like 5 minutes.
Go to Apple Menu > System Preferences > Energy Saver and check the settings under the Power Adapter tab as well as the Battery tab. You may want to reset the Power Adapter so that the monitor stays on for longer.
cornelius

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IBook G4 screen goes black, suddenly doesn't recognize input

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