NUC7i5BNH won't power on

[xxx (Banned - toxicity)]

This sounds very familiar. Try a forum search.
e.g. -

NUC won't start up after BIOS update

Can anyone help, I’m trying to update the BIOS in my i5 NUC and cannot get it to start. I can hear it doing something but am getting the blue light flash once then stay on but no screen at all. Can not boot to F7 either.