My system contains the following:
Samsung QLED 55" TV
Marantz SR7005
A custom PC, MB is ASUS X570 Plus (wifi)
AMD RX6600
WIndows 11/Linux Mint 20.1
The issue is as follows. When booting up the PC the (DEL or F2) options do not show up, nor does the choose Windows or Linux boot option. I have found that this does not occur with the HDMI connect on MBs that have that option. Only by switching the HDMI from the PC directly to the TV can I see the POST info. Any ideas why this is. Previously I ran a PC with an Intel i5 processor and RX580 GPU, same problem.