Hi DerRudi, I wonder if testing with different cables or monitors will give a different result.
I had no problem booting from a DELL* U2413 connected to DP and a Viewsonic* TV connected via HDMI. I used latest BIOS version 0026 with default settings.
Please note my monitors:
Dell u2412m; 1920x1200px; has vga, dp and dvi inputs; connected via mini dp to dp cable
Samsung 226bw; 1680x1050px; has vga and dvi inputs; connected via mini hdmi to dvi cable
No other monitors nor a hdmi tv to test with at my site.
Edit: I've set the secondory monitor in the bios to 'none' and left the primary to 'displayport'. The system now boots normally, including splash screen w/ f2 etc.
Windows does see the secondary monitor, so i can use two monitors as intended. This seems like a work around, but does not really address the underlying issue: no boot with my original settings.
I, too, had this same issue. The workaround indicated by DerRudi is also how I got past the problem.
I keep seeing suggestions about display cables on these forums, but it seems like the vast majority of issues are rooted somewhere other than a cable issue. Half the cable issue would be gone if full size DP and HDMI connectors were used on the NUC, removing the need for mini adapters.