MacBook Pro external display purple/hazy after 20-30 min

rbrayiii wrote:

Running a MacBook Pro 13" (2015) with iOS Monterey 12.7.6. Recently hooked up a Philips monitor model 271V8LB via HDMI. When first connected, display on monitor had normal colors. After being connected for 20-30 minutes, display changed to different shades of purple and had a hazy look. This has occurred with two different monitors. Have tried various different display settings without affecting color.

This MacBook model will not accept latest iOS updates.

Anyone else seen this problem? Could it be a compatibility issue?

Did you try a better quality cable...(?)

ref: Recommended high quality cables: certified Ultra HDMI or Premium ≤ 1.0 m length

When in its purple haze state take a screen shot— screen shots come direct form the GPU— look at that imgae under better conditions or a different device to rule out a GPU failure...

Night Shift is a feature on Macintosh computers that automatically adjusts the display's color temperature to a warmer tone after dark, reducing blue light exposure. This can help improve sleep quality by minimizing the impact of screen time on circadian rhythms

Use Night Shift on your Mac - Apple Support