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! The area between the base of diplay and the top of the keyboard is unusually hot!. Can someone help me solving this issue? Thanks
I would wait for the computer to cool down and try turning it on with one of the ram sticks installed in the working slot only. See if the problem persists from here and try using different ram if booting from one doesn’t work.
