"Black screen after hard drive replacement"に関する回答I have an IMac Late 2013 - 21.5. After installing a SSD drive, I powered up the computer and got a black screen. Only 3 LED lights are on and the 4th remained off. I also, had the most difficult time disconnecting the two cables. Now the cable connector is on the logic board is bent and the display cable won’t stay. Any suggestions, frankly I am out of them?