I have this Apple MacBook Pro that when I try to start it, it will turn on but the screen has lines all over in it and then, as it tries to come on, the progress bar will move very, very slowly and then after a long time the laptop simply shuts down.
I had a new hard drive that I installed and attempted to install the OS on that, and this is what it does: It goes online and downloads the OS, and when it gets done with download, the screen goes black, comes back on a solid blue-white color, the cooling fans on the motherboard begin running at full speed. Nothing comes on the screen and after a long while the laptop simply shuts down.
I connected the laptop to an external monitor and disconnected the cable to the laptop monitor ( to see if the laptop monitor was faulty) and on the external monitor it shows vertical bars on the screen and the laptop acts the same way when attempting to install the OS.
Am I correct in assuming that the motherboard needs replacing?