Thanks! I never had the manual.
Managed to find another DVD player, and...after a bout of the aurora flickering and flashing then putting the led on steadily, it changed over to video and actually worked.
I noticed when putting the 'problem' dvd player back, the LED on the aurora sometimes fades in and out rather than flashes...never seen this before. Yes the PSU is ok!
(edit: a slowly fading led, which the manual describes as 'pulsating' is just sleep mode because it got tired of waiting for a valid video signal. You live & learn).
https://youtu.be/ncsEkqsyqmk