Yes, done all the normal checks. Power LED on, but no screen menus zilch.
Found my way in a few minutes ago by prising the front bezel off. Surprisingly basic and old fashioned, fragile, wiring inside. Nothing obvious and with no service manual, probably no ability to get parts and NEC not even answering the phone for a repair quote, it looks like a bin job :-(
I'm going to get an Eizo colour edge to replace it if I can find one in stock anywhere.