Hello all, I recently purchased a badly abused macbook pro 13. The screen was a rainbow of colors when booted up and was told that the monitor needed replaced. I paid to have that replaced and now the screen is completely dark. Everything else on the MBP works as it should (caps lock, volume, trackpad etc.) I hooked it up to an external display and it works as it should. I took it to a computer repair shop and they told me its the logic board, does that seem right? I am no tech so I know nothing, but I would think if it was the logic board nothing would be working. What do you all think? Thank you for taking the time to read and help me.