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The spiritual successor to Apple’s Thunderbolt Display, the LG UltraFine 5K monitor, which only started shipping out from the Apple online store this week, appears to suffer from a major fault: when placed within two metres (6.5ft) of a wireless router, the display starts to flicker; move it really close, and the monitor goes black and becomes unusable.

An LG Electronics support person confirmed the issue, saying it “only happens for the 5K monitors we have, not other LG monitors.”
If that wasn’t bad enough, 9to5Mac’s Zac Hall reports that his LG 5K monitor, under the duress of a nearby Wi-Fi router, can freeze the MacBook Pro that it’s plugged into, forcing a reboot to bring it back. When he moved the router (an Apple AirPort Extreme) from beside the monitor to another room, everything went back to normal.
A support rep for LG Electronics confirmed that the 5K monitor can be adversely affected by a nearby wireless router, and said that the issue doesn’t affect any other LG monitors. Hall was asked to place the router “at least 2 metres away” from the monitor, and “to let us know” if the problem still persists after that.
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