NeXT Cube - powers on briefly then off again

[Ian Finder]

I would replace the electrolytic capacitors in the power supply before going further.

Sent from my iPhone

> On Oct 25, 2015, at 15:38, Toby Thain <toby at telegraphics.com.au> wrote:
> 
>> 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.
> 
> --Toby
> 
>> Any clues?
>> 
>> Thanks in advance
>> 
>> --Toby
>> (not having a good classic computing week)
>