Hi All new member here so please bear with me.
Currently putting together a system similar to I had in built 1996 as part of a nostalgia project.

S3 Trio64+ PCI Video Card Eagle
430TX Socket 7 Motherboard 6x86
Standard AT 200w PSU
Creative Labs Sound Blaster CT4670 PCI sound card
Using a standard VGA Monitor - not CRT
32MB RAM

I have no HDD connected as yet.

Now issue is I power on the system POST displays all good though notes about CMOS - though because time hasn't been set.
I go into BIOS save & Exit
After this I get "Sleep Mode Enabled" displayed, then "No Video Detected"?

EDIT - Well it seems after I changed settings in BIOS relating to correct CPU 6x686 166 etc. Then once I saved settings worked 😀

Sadly my Bigfoot drive hasn't faired well over the years and understandably is not booting I/O error.