I've been using the LG 43UN700-B for a few weeks now. It's connected to a 16" MacBook Pro (running 10.15.5) for power and video via the USB-C cable that came with the display.

Right from the start, I've been experiencing occasional color glitches. Every 3rd or 4th time I wake the MacBook from sleep, the external display will show very low contrast (like a gray filter applied to the whole image). The MacBook's built-in display is unaffected. Most times, I can get back to normal colors by temporarily changing the external monitor's resolution.

Any ideas what could be causing this and how to fix it permanently? I was unable to find any firmware updates for this display.

1 Answer 1


Did some more searching through system preferences and the OSD (on-screen display) settings. Looks like high dynamic range may have been the culprit here. After disabling it yesterday, I haven't had any more color issues (usually happens several times a day).

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