I can't get my LG ULTRAFINE DISPLAY 5K to work with my MacBook Pro (15" 2017)

I can't get my LG ULTRAFINE DISPLAY 5K to work with my MacBook Pro (15" 2017)


I've downloaded the LG Screen Manager from the Apple Mac store -- when I run the application it says "it does not recognize the external monitor'


I've updated the Mac OS to Catalina yesterday and re-downloaded LG Screen Manager App and still no luck


Any help/advice friends?


Posted on Aug 18, 2020 5:54 AM

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Posted on Aug 18, 2020 8:34 AM

Grant -- thank you for the swifty reply


I got the issue resolved by snooping around on tech sites


The issue was bizarre I discovered. We could not figure out why both our LG screens (4 and 5K) worked before but then the 5K stopped dead/black screen -- turns out we moved our Wireless Router to the office yesterday and THAT was the only difference and it happens to be the problem/solution --THE LG ULTRAFINE DISPLAY 5K WILL NOT WORK IF IT IS IN CLOSE PROXIMITY TO A WIRELESS ROUTER! See really helpful article below


https://www.macworld.com/article/3163446/lgs-5k-monitor-doesnt-work-near-wi-fi-routers.html


So problem solved but man it was an epic puzzle to uncover what was going on (called AppleCare multiple times) -- so simple a solution but so bizzarro a problem (apparently there is a part in the LG that is affected by wireless radiation -- hardware issue not a software fix)


tomf

6 replies
Question marked as Top-ranking reply

Aug 18, 2020 8:34 AM in response to Grant Bennet-Alder

Grant -- thank you for the swifty reply


I got the issue resolved by snooping around on tech sites


The issue was bizarre I discovered. We could not figure out why both our LG screens (4 and 5K) worked before but then the 5K stopped dead/black screen -- turns out we moved our Wireless Router to the office yesterday and THAT was the only difference and it happens to be the problem/solution --THE LG ULTRAFINE DISPLAY 5K WILL NOT WORK IF IT IS IN CLOSE PROXIMITY TO A WIRELESS ROUTER! See really helpful article below


https://www.macworld.com/article/3163446/lgs-5k-monitor-doesnt-work-near-wi-fi-routers.html


So problem solved but man it was an epic puzzle to uncover what was going on (called AppleCare multiple times) -- so simple a solution but so bizzarro a problem (apparently there is a part in the LG that is affected by wireless radiation -- hardware issue not a software fix)


tomf

Aug 18, 2020 8:54 AM in response to tfxfarrell

BTW


Both displays now show up in:  menu > about this Mac > (System Report) > Graphics & Displays


  Displays:

Color LCD:

 Display Type: Built-In Retina LCD

 Resolution: 2880 x 1800 Retina

 Framebuffer Depth: 30-Bit Color (ARGB2101010)

 Mirror: Off

 Online: Yes

 Automatically Adjust Brightness: No

 Connection Type: Internal

LG UltraFine:

 Resolution: 2560 x 1440 (QHD/WQHD - Wide Quad High Definition)

 UI Looks like: 2560 x 1440

 Framebuffer Depth: 30-Bit Color (ARGB2101010)

 Main Display: Yes

 Mirror: Off

 Online: Yes

 Rotation: Supported

 Automatically Adjust Brightness: No

 Connection Type: Thunderbolt/DisplayPort

Aug 18, 2020 11:05 AM in response to Grant Bennet-Alder

Ah, thanks -- I did not realize that warning existed: i guess we rushed the purchase and did not do our research.


I've now noticed this afternoon that when I stream YouTube on my MacBook, the LG monitor glitches a lot and goes to black screen for a few seconds intermittently. Once I quit out of Chrome/YouTube, it seems to settle back to normal with no issues


This Monitor just does not seem to like the Router...!


The monitor itself is actually good value and has a v good resolution for the work we are doing -- I just never expected to have these issues with hardware and a router


tomf


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I can't get my LG ULTRAFINE DISPLAY 5K to work with my MacBook Pro (15" 2017)

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