LG UltraFine 27MD5KL Service Manual page 16

[CIC Guide] About USB Unrecognized
Purpose
Check the customer's PC environment and inform user guide regarding not
recognizing USB devices (or USB HUB).
Contents and Guidance
[Guidance]
1. Symptom : Unrecognized problem when connecting a USB device (or USB HUB) to a monitor.
2. Root-Cause : Compatibility Issues with PCs
3. Guidance
1) Checking the symptom : Check the manufacturer/model name of the PC used by the customer (If Mac or Windows or etc.)
2) Customer Guide : Inform customer sequentially of the following.
a) Reminding that the SF model is a Mac-only monitor, you need to ask if customer is using a Windows PC.
b) Especially for Windows PCs with Razor Blade RZ09 2015 PCs, we recommend connecting the USB device to PC
because It is a PC problem. (It is already verified)
c) For Windows PCs, You can check Thunderbolt Version in the following order.
#Reference : For Razor Blade RZ09 2015 PCs, NVM version is14 and for Razor Blade PC 2018, NVM version is 33.
Because the 2015 PC has a low NVM version, it may cause compatibility problems with monitors.
From the desktop icon tray,
Right-click above ICON and select "Settings"
Bottom left, select "information"
Applied model
24MD4KL/27MD5KL
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Only training and service purposes.
24MD4KL/27MD5KL