Solved Cannot Boot In Every Possible Mode Macbook Pro 17 Unibody
Chosen Solution After restarting for installing the latest HighSierra security update my nightmare started!! The MBP don’t boot up correctly anymore, i tried all possible combinations, smc, nvram reset, a boot from a usb stick but same result: when i switch it on , i can see vertical pink stripes on display and after the status bar increase the display become grey. I then opened the back plane for a check to verify the status and suddenly one of the 8GB memory banks (the one on the upperslot) failed and caused the three beeps at startup then i removed it but same behavior!...