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White screen no output to external monitor

I had replaced a iBook G4 Display and when I turned it on it displayed a white screen and I tried to output it to a external monitor but nothing appeared how can I solve this a Model Number A1105 and when trying to see if it would boot to usb it would not work what do I do know.

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A white screen is usually a hard drive problem. Try booting from the original installation DVD ( hold down the “C” key on boot up) or a system compatible external USB drive (hold down the option key on boot up).

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Didn’t work tried booting up to usb but just at a white screen with nothing on it

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Hector Flores crwdns2934231:0crwdne2934231:0
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