How to get into the LG OLED HDMI diagnostics menu

This guide will cover how to access the LG diagnostics and information menu. This requires entering a secret key combination on the TV remote.

This has been confirmed working on:

How to access the HDMI diagnostics menu

Open the settings of the TV by pressing on the gear icon on the remote
Highlight or move the pointer over the All Settings option and open all settings
Select the Channels option
Move the pointer or highlight Channel Tunning
Press the 1 key on the remote five times quickly

After a moment, the HDMI diagnostics menu will open.