Editor’s Note: This story had been updated at on February 3 with comment from LG:
“We have been made aware that the LG UltraFine 27in 5K display (model 27MD5K) may experience performance issues caused via signal interference when a Wi-Fi access point is positioned behind the display within a distance 2ft (0.6m). Changing the location or positioning of either the router or the display should resolve the issue.”
“Customers continuing to experience issues with their LG UltraFine displays are advised to contact their nearest LG customer centre for prompt service. LG apologizes for this inconvenience and is committed to delivering the best quality products possible so all LG UltraFine 27in 5K displays manufactured after February 2017 will be fitted with enhanced shielding.”
Original Story 1/31:
Apple doesn’t offer its own high-end, high-resolution desktop monitor anymore. Instead, it recommends the LG UltraFine 5K Display, and even sells it through the Apple Store for around US$1,000. It’s an expensive 27in monitor that doesn’t include the aesthetics an official Apple product enjoys, but then you’re still getting a 5,120-by-2,880-resolution display on your desk.
However, the LG UltraFine 5K seems to have a rather serious flaw. Placing your router within 6.5ft of the display causes the next-gen monitor to start flickering. The closer the router is, the more chance it ‘goes black’ and becomes unusable.
, the flaw had been brought to LG’s attention recently through the efforts of one Patrick G from Bolton, an electrical engineer for 35 years. He complained via email of a ‘WAP Proximity Issue’ that happens when either a router or wireless access point is placed within 48in (4ft) of the LG UltraFine 5K.
LG Support confirmed this is an issue, but only with the LG UltraFine 5K monitor. The LG UltraFine 4K, and any other computer monitor for that matter, does not suffer from this problem. As to the cause, LG still needs to explain why it happens. The fix is to keep the LG UltraFine 5K away from routers and access points by at least 6.5 feet.
Anyone who owns the LG UltraFine 5K can check the manual, but will only find reference to not using the display where ‘Electromagnetic Interference occurs’. There’s no specific reference to routers and access points, but it’s clearly an issue you need to consider. Alternatively, opt for the LG UltraFine 4K and avoid the problem completely.
If you need further evidence that purchasing the LG UltraFine 5K may be a bad idea, you only need to look at the reviews on bothand .