hi to all…
macbook of my bestfriend (motherboard 820-3332)
he says that it doesn’t boot anymore (question mark)
boot from usb, but the ssd is not seen
i’ve seen on interne that it could be a bios related problem
following a youtube guide,i’ve TRIED to clean me region
after that, powering up the mac, the apple logo appear after a lot of seconds and stuck there with fan at full speed.
so i’ve tried one bios downloaded from internet but not laptop is dead (even with the original dump)
i cant power on it anymore with battery or power supply. i’ve light on mag safe but it is completely dead
if i disconnect the battery, connect magsafe and reconnect the battery, fans start to sping fast-slow-fast-slow-fast-slow
it think i’ve broken the bios chip…so i would like to try another chip with the original bios modded by you. thanks in advance and sorry for my bad english
i can’t upload the original dump because it is 8mb and maximum size is 6mb
Hi friend, i think your laptop has the Intel Boot Guard active so it’s not possible to modify your firmware and that cause bick.
I don’t know Apple Firmware , so we can try to recovery it, but i cannot sure nothing …
Regards