Colorful screen glitching -> broken display + workaround
My parents Macbook Pro A1502 recently developed some heavy screen glitching / colorful flickering all over. Here’s what I checked so far:
- Issue starts right after boot to full UI, more present where there is (mouse) movement.
- Rarely there are a few seconds where everything looks fine, fullscreen videos on YT weirdly seem to be ok.
- Still glitches in red/green/blue if I set MacOS UI to grayscale
- Screen also looks mostly fine during startup or diagnostics but sometimes shows the issue during the software update screen
- The problem is not present on an external display (HDMI) or in screenshots
- If an external screen is connected via HDMI, the flickering/glitching on the internal screen and the external display stops (HDMI cable w/o a device connected on the other end does nothing, though)
- elementary OS does not show the same problems
- Diagnostics additionally show NDC001, “CPU System Agent Core” in iStat Menus sometimes reads 0˚ (which I believe the machine might have already shown when I gave it to them 3 years ago, so probably unrelated)
Any ideas what the problem might be and how it could be fixed?
And what worse symptoms could come next, if any?
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Pretty much exactly the same issue was described here:
What is the cause of this display glitch?
The glitch pattern looks a bit worse and changing the logic board did not fix it.
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