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MBP / MacOS 11.4 / Reset SMC every day due to screen flicker

MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)

2.4 GHz Quad-Core Intel Core i5 / 8 GB 2133 MHz LPDDR3 / Intel Iris Plus Graphics 655 1536 MB

MacOS 11.4, automatic update.

Every 15 seconds display (built-in/external LG27-850) flicker, result, not possible to change file names in Finder, Safari search field stop, Word/Excel issues.
Run Apple SMC reset instructions and flicker stops.
Close down all apps
Shut down MBP using Shutdown
Display (both are dark)
Lid open
Touch any keyboard key and MBP goes start, without having pressed Start.
No flicker.
Next day at start up, flicker again.
Battery shows 100% charged
External connections during Shutdown - Power supply (Apple), external Display 27LG850, Apple Keyboard)

Any guidance is appreciared,

Posted on Jul 16, 2021 2:18 AM

Top-ranking reply

Level 10

83,952 points

Posted on Jul 16, 2021 4:19 AM

1. Displays

Quote:

If the display is flickering: Make sure your Mac and display are connected to one another with good quality cables and adapters. You may also be experiencing interference from a nearby power line, a fluorescent light, a radio, a microwave oven, another computer, or another electrical device. Try relocating nearby electrical devices, or moving your Mac and display.

2 Get help with video issues on external displays connected to your Mac

3. If these steps don’t help, please contact Apple Support.

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