Air 13 A1466 EMC 2632 820-3437 i5 and i7

Hello All I have two macbook's Air 13'' Mid 2013 one on i5 and one on i7 bouth have firmware password.
First one on i5: I removed efi chip 25Q064A and write it with dump from other topic on this site, welded it to motherboard and turned ON the where no password any more but it stops loading on starting OS X on apple logo, in verbal mode it shows errorcode 8877652

"DRMStatus: iTunes/Apple Store Content Access Problem. Content playback may be disabled on this computer. You can Continue to use the machine, but you should contact an Apple support representative. ErrorCode: 8877652"

It seems to me that dump was wrong, I dont have an original dump from this motherboard and need help

Second one on i7: I removed efi chip MX25L6406E and read dump from it, I found $SVS and overwrited it (it has 321 byt long). Welded chip back to board but Macbook but he does not want to turn on, totally dead, the fan does not turn on ( I have welded this MX25L6406E with pass free dump to first motherboard (hte one on i5) and he also does not want to turn on. I need help with this Macbook too.

I need dumps for AIR 13 A1466 EMC 2632 820-3437-B mid 2013 on I5 25Q064A and AIR 13 A1466 EMC 2632 820-3437-B mid 2013 I7 MX25L6406E

DRMStatus problem may be solved by OS re-install from scratch. I.e. you need to delete any partitions from the disk before OS installation. Probably you need a bootable USB flash drive to do that.

Thank you for your reply, I repeatedly deete partitions and reinstalled operational systems and still pops up this error. with a bootable USB drive installation of operating system also does not want to go, it hang on Apple logo and it does not move, but I will try again and write the result

Try to boot with USB and launch an installer, invoke Terminal and inspect internal drive, command:You should don't have any partitions before installation process starts. Use 'diskutil' tool to remove.

ok will delete all partitions )