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How do I fix this?
Mac Pro, macOS 12.2
I believe your "shipped in the box" cable (notorious in general for being a "lowest bidder" cable) may be inadequate for Full "5K" at 60 Hz hi-color. the correct ThunderBolt-3 cable has a ThunderBolt at each end. [The other possibility is that you were using the inadequate USB-C cable supplied,
I believe the ThunderBolt cable you bought may not be adequate for this high-end situation.
The simple experiment would be to reduce the resolution or colors, and see if the blinking abates. (caution, not SCALED resolution, ACTUAL resolution say, to "4K" rather than "5K" = "best for display".
I believe your "shipped in the box" cable (notorious in general for being a "lowest bidder" cable) may be inadequate for Full "5K" at 60 Hz hi-color. the correct ThunderBolt-3 cable has a ThunderBolt at each end. [The other possibility is that you were using the inadequate USB-C cable supplied,
I believe the ThunderBolt cable you bought may not be adequate for this high-end situation.
The simple experiment would be to reduce the resolution or colors, and see if the blinking abates. (caution, not SCALED resolution, ACTUAL resolution say, to "4K" rather than "5K" = "best for display".
The cables that clearly state they fit the high-end hi-color situation are said to support HBR3:
https://www.apple.com/shop/product/MQ4H2AM/A/thunderbolt-3-usb%E2%80%91c-cable-08-m
Thunderbolt 3 Pro Cable (2 m) - Apple
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I have two cables. One that came with the LG 5k UltraFine (it is 6 feet long) and I bought a Belkin Thunderbolt 3 (2 meter) cable (rated for 5K and 40 Gbps) off of the Apple accessories website. The LG monitor itself was also bought off the Apple website.
Thanks for your sympathy!
Just a guess. Make sure you are NOT using the three USB-C ports on the display.
Thank you... alas, no that wasn't the problem... Thank you for your help and sympathy!
EXACTLY what ThunderBolt cable, where did it come from, and how long is it? {up to 1/2 Meter, longer than 1/2 meter}
Thank you! I will try this and report back... You are kind to reply to this.
My LG 5k UltraFine monitor is blinking on and off (about every 4 seconds) when connected to my Mac Pro 2019 with W5500X video card and latest operating system. Have replaced the thunderbolt 3 cable, no fix. What can I do? Is the monitor broken?
