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Repair information for PowerBook G4 Aluminum laptops with 15-inch displays.

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Why is my PowerBook booting into Open Firmware?

I've just swapped out the DC board to solve a charging problem and now when I power on it boots into Open Firmware.

The message on the screen invites me to type "mac-boot" to continue booting and when I do I get a grey screen but sometimes it shows 'ALLOC-Mem request too big!"

I've tried to force it to boot from the optical drive but it will not do so.

Anybody got any ideas as to what may be wrong?

Rgds

Peter

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Take the memory out and the airport card, reseat them both. Next, reset the PRAM on boot up. Here's how: https://support.apple.com/en-us/HT204063

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Have you tried resetting the Pram and SMC?

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Peter Benson 将永远感激不已
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