[SUCCESS] A1419 EMC2546 iMac 13.2 late 2012

Hi all, I Erroneus installed Clover boot loader on my iMac and at the first boot, it damaged the bios, according to what I find on the net about this thing.
So the only solution seems to replace EFI bios with a good one, or trash the iMac.
My iMac is a:
Type: i7 late 2012 13.2
Code: A1419 EMC2546
APPLE Logic Board code: 661-7159
Manufactorer Logic Board code: 820-3299
Installed bios version: IM131-0115_B00
Serial: DGKKT0RHDNMP

After a bios damage, there are any life signal, except a white screen with no apple or anything else.
I found in repository a bios dump named 2546_A1419_2012_27_i7-3470S.bin that seem correct.
I tried to reprogram my 25Q064A chip with this image, but the iMac still dead ad the screen now remain black.
Before reprogram flash chip, I reed the content and make a backup of my damaged bios.
I programmed the chip as is without my serial number. How I change the serial inside bin ? replace simply with HEX editor ?
Also, I see in this forum that is needed to clear ME section. Can someone tell me how I can do it ?
Can someone help me ?

I Attached my damaged dumped bios
Also attached a good dump found in the repository that seem to fit
I ned help to change serial and clear ME section

Thanks in advance.

Bye

HERE YOU ARE. after iMac boots, need to reset smc and pram.

Thanks for your work , but seems that this bios image is not good for my board.
Whit this bios there are not any life signal with a black screen.

I reprogrammed with my old corrupted bios, and at least the screen was white

So I need a correct bios image I think, but seem there are not a good one around.

If someone ha ve other image to try...

Thanks in advance.

I GOT IT, I found elsewhere (paid) a correct bios image that works. My iMac turned alive

I attach here in case can help some other.

iMac 27" - Late 2012
Serial: XXXXXXXXXXXX. (replace your serial instead of XXXXXXXXXXXX)
Model #: A1419
Sales Number: MD096LL/A
EMC 2546
Logic Board, Quad-Core i7, 3.4GHz, 1GB GDDR
Apple code: 661-7159
Manufacturer code: 820-3299

Thanks for all helped me

P.S. I can download other 7 bioses from a large commercial repo. I paid for 10 and used 3. If someone need something, pls ask me, I check if there are something.
My download ticket is valid till 9/22.

Nice to hear that you have solved problem. FYI, do a apple AHT test to see whether your serial shows correctly or just shows NOT AVAILABLE.

Hi, AHT say: System serial #: ?

Is a bad thing ?

All seems work fine, and in a system information in OSX the serial is shown correct.

Hi all.

Is over 1 year that I wrote this success story, so also many other contacted me via PM to know where I downloaded (paid) bioses.
I don't know if i violate some site rules, so I put here the url where I found the working bioses:

BIOSES 

Also I downloaded some other related bios that I not used because the first one tried works for me.

I attach all bioses for who have less lucky

Good luck 

Ciao,   Davide