I had a HP Elitedesk 800 G4 which have USB-C Alt Mode config and connected to USB-C monitor, but once I try to enter UEFI config page, the system hangs.
Also the system not accept Function key during boot up if I connected to USB-C monitor or HDMI TV screen, I needs connected to DP monitor to get into BIOS/UEFI setup screen.
Any ways to let HP know and fix this issue? My country (Hong Kong) always not available for support chat