Chosen Solution
I got screen issues on my MacBook pro 13" early 2015. Is like red glitch showed. Please look at the picture.
The weird thing is when I play youtube video or any video on my mac, the red glitch disappears. =.= Heres the video
I already tried connecting to an external monitor, and the results are good. I did not find the issue on the external monitor or on my mac screen. So I’m pretty sure this isn’t damaged from VGA. I already tried reseting the NVRAM and SMC, reinstalling the os, update the os, removing and reassemble LCD and flexible cable, nothing gave me the clue. Still the same. The red glitch still shows up in my mac screen. I’ve used this laptop for at least 3.5 years btw :) Have you ever experienced with this, then what should be done ? should I replace the display LCD ?
Your logic board has a problem within the Mux logic. Basically the video signal is sent to one of three outputs! The internal, HDMI as well as both Thunderbolt ports. I’m suspecting the HDMI port is not engaging the load when the port is not being used so you are seeing a signal reflection interfering with the output. To test this plug in an HDMI cable by its self, I bet you’ll see the internal display will not have any problems. Update (07/22/2019) You might be able to find someone with the deeper skills and the needed tools to fix your logic board. Otherwise replacing the logic board is your only option MacBook Pro 13" Retina Display Early 2015 Logic Board Replacement
