Hi. I think this is the most advanced forum for apple macbook repair. I have a problem with my macbook retina 15", late 2013, A1398, 820-3662-A. I was trying to unlock efi password and I accidentally wrote wrong command in flashrom so I deleted the rom before I made a backup.

I have tried to flash another rom from identical macbook and after flash macbook powers on but just to hear chime sound it takes about 20 seconds and event it won't load osx until I make PRAM reset. After osx load the sleep don't work and mac runs slow. What could me a problem, what m'i doing wrong. Please help i'm going crazy here I tried everything with no success.

Sorry for my English. I really need help to fix this if even possible. Please help.