Need iMac clean EFI A1418 820-4668-A

[focus2k]

Hi there,
need help. Got a cheap iMac 2014 but it´s not booting. Every efi i found will not work probarly. Boots slow or in chinese or no boot.

Can u guys help me out.
It´s 820-4668-A
SN: C02MWAT3FY0T

tryed to set my serial and clean ME, but everething is not working.

thx a lot

[techman1025]

Re: Need iMac clean EFI A1418 820-4668-A

Hi there,
need help. Got a cheap iMac 2014 but it´s not booting. Every efi i found will not work probarly. Boots slow or in chinese or no boot.

Can u guys help me out.
It´s 820-4668-A
SN: C02MWAT3FY0T

tryed to set my serial and clean ME, but everething is not working.

thx a lot

If you uploaded your original file i'm sure somebody would have help you.
Techman1025

[focus2k]

Re: Need iMac clean EFI A1418 820-4668-A

here is the original dump.
with this one no chime and no boot.

with another efi from this forum my mac chimes and load os, but stops on 90%.

Thing something in the original go wrong on update.

[piernov]

Re: Need iMac clean EFI A1418 820-4668-A

Clean ME region on the one that chimes. (and put correct serial number)

[focus2k]

Re: Need iMac clean EFI A1418 820-4668-A

Clean ME region on the one that chimes. (and put correct serial number)

tried this, but won't work... maybe too stupid or it really don't work...

[SMDFlea]

Re: Need iMac clean EFI A1418 820-4668-A

post the bios that chimes.Post the one you havnt edited

[focus2k]

Re: Need iMac clean EFI A1418 820-4668-A

this one chimes... got it from another post...

[techman1025]

Re: Need iMac clean EFI A1418 820-4668-A

hERE
tECHMAN1025

[focus2k]

Re: Need iMac clean EFI A1418 820-4668-A

still boots realy slow.. 15 Minute of boot (from a known good bootstick) and still 80%... not load the complete installer.. whats wrong?

Linux runs perfect on it ....

[piernov]

Re: Need iMac clean EFI A1418 820-4668-A

Boot into Windows and check if Intel Management Engine Interface device works properly in device manager.

[focus2k]

Re: Need iMac clean EFI A1418 820-4668-A

windows stick don't even recognized... :-(

in recovery, this happens:

[focus2k]

Re: Need iMac clean EFI A1418 820-4668-A

Ok, im really sorry. Maybe I made a mistake.
My Board is 820-4668 , but I don't find a efi with this number...

[SMDFlea]

Re: Need iMac clean EFI A1418 820-4668-A

try this one .Also do a PRAM reset and reinstall the OS.

.

[focus2k]

Re: Need iMac clean EFI A1418 820-4668-A

Perfect ��
Workings

Thx@all