Mac is set to never go to sleep be it on charge or battery, so I don't think this is an issue either. What I did notice is that this flickering sometimes happens alongside charger light going off, which I think is related to point #1 above.ĭoes this sound like a bust charger that is going on and off for short periods of time, or something more serious with my MacBook? I checked HDMI connection and everything seems to be fine (new monitor, new cable). ![]() Monitor won't work or receive signal if I unplug MacBook from the charger (monitor has its own power supply).Įvery now and then, monitor will shut/disconnect for a short while and come back online. It works fine while the lid is open, but as soon as I close it, various issues occur. I hooked up my old 2012 retina MacBook Pro to an external 4k monitor via HDMI.
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