820-00163-A Infinite Chime Loop Blackscreen

[dam1inc]

Have an A1398 EMC 2910 Macbook pro , customer said he trying to flash clover on his device and accidentally installed in EFI folder.

So i pulled SPI chip and cleared RegionME using these links:

https://www.win-raid.com/t596f39-Intel-Management-Engine-Drivers-Firmware-amp-System-Tools.html

https://www.win-raid.com/t1658f39-G...-CS-TXE-Regions-with-Data-Initialization.html

but no dice.
Either I need a whole new .bin to work with or im missing something.

Does anyone here have any experience with this?

thanks

 

[2informaticos]

Try new BIOS file, if you suspect BIOS issue.
ME region can help in this case I suppose.
Of course you will need clean ME, or keep ME region from backup, just for test.

 

[dam1inc]

Yeah that sounds like a good place to start. Ive already pulled original and cleared RegionME but still chime loops. So maybe just clearing someone elses BIOS.bin will do the trick. Ill try that and post results. Thanks for the reply

 

[dam1inc]

yeah found a bin for same model/emc cleared RegionME, flashed it and problem fixed??

 

[2informaticos]

I don't understand if you tried it, or just ask...

 

[dam1inc]

lol oops, i dont know why i added question marks to the end of that sentence...job is done thank you

 

[2informaticos]

Good to hear that.
Means the main BIOS zone has been f***d, not only ME region.
In fact, original ME region could still be good; just try it, if have time.