NeXT Cube - powers on briefly then off again

Toby Thain toby at
Sun Oct 25 17:38:00 CDT 2015

On 2015-10-25 5:28 PM, Toby Thain wrote:
> Hi,
> After a few years I wanted to try my Cube with the soundbox/VGA splitter
> configuration for the first time. (I have the fading phosphor N4000A so
> have been keen to have an alternate video solution.)
> However, all is not well. Using the keyboard power button, the machine
> powers on for a couple of seconds, just long enough to see a NeXT logo
> and grey desktop on the VGA (yay!) but then powers itself off again.

I did the obvious thing and tested it with a standard monitor and cable 
and everything is okay. So the problem must exist with the 
splitter/soundbox setup. Soft power signals?

Any suggestions welcome.


> Any clues?
> Thanks in advance
> --Toby
> (not having a good classic computing week)

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