I've been away from the site for several years, but before asking for help, I did make a contribution.

Since setting it up with BH 3.05, my Ultimo 4K has worked well. Every so often it has crashed with the green screen - but a quick power-cycle and all was well again. However, yesterday after it crashed, when I then power off and on, all that happens is that the white light on the front flickers constantly - and that's it.
It's been suggested that I need to reflash the image. Would I just get the latest BH (and where best to find it?) and use that, or do I have to first flash the official VU image. And am I right in thinking I have to then set the box up from scratch? Sorry if this sounds a silly question, but it has been several years since I've done anything to this receiver.

Many thanks in advance.