Apple imac a1224 820-2143-a

with that BIOS is on white screen. with the original bios this does not happen to me can someone remove the efi password?
 

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yes with the original firmware. with the other firmware the white display remains the chime and no boot no recobery mode
why say old only password ?
i think imac for you can one error hardware other....Please check all
 

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