recently purchased both of the above. when connected and switching on (startup) one of the monitors flashes on and off (unstable) the other black screened. The connections i'm using is usb-c from monitor to MacBook pro. After a number of minutes, in most cases, both monitors connect.........soooo frustrating!!! what the **** is going on??? spoke to both LG and Apple and neither had a clue!! Any help please?
MacBook Pro 14″, macOS 15.3
Those 34WR55QK (I could not find 555) are 4K displays (3440 by 1440) with the bottom half missing, and 10 bits/color HDR capable. They must meet the same requirements as full 4K displays.
inputs include HDMI, DisplayPort, and USB-C.
At those data rates, you MUST have high-spec cables shorter than 1 meter
USB-20 trademark or higher for modern USB cables
(HDMI cables must be ULTRA certified, and can can be slightly longer). PREMIUM HDMI cables are slightly lower spec, but will NOT suffice for 4K at 10 bits/color.
Don't count on the cables "shipped in the box" to have any features except MAYBE the correct connectors. These are often "lowest bidder" cables.
....I have 80gbps, 240w 1m leads at the moment....
Remember that Readers here are other Users like you. We have no ability to intervene on your behalf, only recommend.
Well they need to put it up in lights....for all levels to understand.
Update:
Purchased the cables as recommended with no success! plugged from my very expensive Mac book pro into my quite expensive LG ultra wide screen x 2 monitors.....
Remember that Readers here are other Users like you. We have no ability to intervene on your behalf, only recommend.
MacBook Pro M4 is NOT an experiment. It works great with the very expensive Apple brand displays, which have been tested extensively.
If you choose to wander off the rose-petal covered path that Apple has provided, and install non-Apple displays of your own choosing (and save CONSIDERABLE amounts of money) that choice comes with some additional work on your part in exchange for that savings. MANY users have been able to do this very effectively, but there is some complexity to it.
If your display makers can not help you make these specific displays work, then THAT is the part that should be sent back. That should be their area of expertise.
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It does not help that that OTHER Operating System uses only the "looks good enough to me" standard for display signal quality.
The Apple standard for its built-in hardware-accelerated displays, makes them suitable for full-motion video for production/display of cinema-quality video with NO dropped frames, and NO dropouts or partial-blank scan lines due to memory under-runs or other issues. Any errors in transmission will cause the display to disconnect, or never connect in the first place.
Macbook pro M4 to two LG ultra wide monitors
