If you have remote access enabled or remote login, I would then boot and try to get logged into the system that way to better diagnose the issue. I see that you did a PRAM reset, but it doesn't hurt to try resetting PRAM continuously 4 to 6 times in a row quickly. Can anyone else with the same model rMBP verify whether this is normal? I notice in the system report at Graphics/Displays, it only gives me something about the integrated "Intel HD Graphics 4000". I'm using gfxCardStatus and I notice it isn't really able to switch to the discrete GPU anymore.ĭoes anyone recognize this issue? I suspect it's a hardware issue (broken GPU? broken connection to GPU?), are there any more tests I can do? Most things seem functional, besides it being a bit sluggish and the fans still stay at full speed (and there seems to be a LOT of battery drain). After lots of fiddling with plugging and unplugging an HDMI cable to an external monitor, I eventually got the screen to turn on. I did a PRAM and SMC reset, both to no effect. After it boots, the fans stay on at full speed. After a while, I can hear ticks as I adjust the volume, I can adjust the keyboard backlighting, etc. I do hear the startup chime, and it actually does proceed to boot, but the screen stays dark. When I boot it, the screen is black (no backlight: Apple logo doesn't light up). Since yesterday I've been having major issues with my 15" Retina MacBook Pro (mid 2012 model).
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