Recently, after the announcement of windows 11 a lot of people have been enabling TPM and secure boot to get the windows 11 update and most of them after enabling secure boot get a blank screen on restarting with no access to bios. Same has happened with me. Basically what you have to do is if you have a graphics card installed, remove it and remove your motherboard's CMOS for 5secs. It will reset your bios setting. Insert your CMOS battery back in and this time connect your HDMI cable to the motherboard. You'll be able to see the display. The secure boot option will still be enabled, you got to manually disable it and then insert your graphics card to achieve the display run by the Graphics card.
For further knowledge regarding Secure Boot and TPM, checkout this link:View: https://youtu.be/WRFnOh_pqX8
For further knowledge regarding Secure Boot and TPM, checkout this link: