After 5 attempts and no boot menu I gave up an went to reflash Diablo.
It would not reflash and gave me a USB cable error.
When I unplugged the USB cable the boot menu showed up and I've been able to reboot and get the boot menu.

I hope I've not lost the flash capability but I've wasted 4 hours on it so far.

Not easy anymore.

Now I need to order the 8Gb external card.