Sometimes, upon restarting the first problem message that I got was GPU panic like the one shown below:Īnonymous UUID: 32BD6DA8-14C2-38AD-E466-F3B6DDCE6F7F But as soon as, I started using it, all of a sudden it would show a Black Screen, but CAPS LOCK would still glow green and so I would then reboot it again, only to Black screen. I got my MacBook cleaned and then it booted fine. I tried all that, but it refused to work. I started asking myself why would this happen? Was it due to upgrade to High Sierra 10.13.3 or was it that my machine really developed some hardware problem? I asked a friend of mine what can I do and he suggested SMC Reset followed by PRAM (NVRAM) Reset. After that, many times I would boot straight into Black Screen, and the only sign that the machine was awake could be just tested by pressing the CAPS LOCK key (turns on the button-light) or connecting an External USB with a indicator light. It all started when my MacBook Pro showed me black screen after waking from sleep.