The LG UltraFine 5K Display has a known issue where if a wireless router is placed within 2 meters of the display, it could cause the display to go black and completely lock up the connected MacBook Pro.
LG now says that they’ve identified the issue and all new UltraFine models produced in February will not be affected due to the ‘enhanced shielding’. Existing owners, recommended by Apple, will need to contact LG support for assistance.
The ‘enhanced shielding’ does indicate that earlier models electronics were not being isolated properly.
Initially, LG suggested moving the router away from the display, so it’s nice to see them actually fixing the issue rather than going around it. However, this will be the only option as customers wait for the fixed version.
We have been made aware that the LG UltraFine 27-inch 5K display (model 27MD5K) may experience performance issues caused by signal interference when a Wi-Fi access point is positioned behind the display within a distance 2 feet (0.6 meter). Changing the location or positioning of either the router or the display should resolve the issue. Customers continuing to experience issues with their UltraFine displays are advised to contact their nearest LG customer center for prompt service. LG apologizes for this inconvenience and is committed to delivering the best quality products possible so all LG UltraFine 27-inch 5K displays manufactured after February 2017 will be fitted with enhanced shielding.
Assuming the fix was fixed immediately, all new orders for the LG UltraFine 5K Display should be fitted with the enhanced shielding. Existing customers will need to contact LG support for ‘prompt service.’