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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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