[rescue] Unhappy MicroVAX II

[Tom publix]

You probably need to change the little pack of batteries that are behind
the console panel. They are needed to run the TOY clock but run down, they
can cause weird thing to happen (besides not wanting to boot) I'm not sure
what the voltage are on these things, but if you don't want to do it
yourself, you can have one made  at my local Batteries etc.


On Tue, Apr 16, 2013 at 12:00 PM, Ian Finder <ian.finder at gmail.com> wrote:

> Nope, no hex display at all. Totally dark, even with all the other optional
> cards removed. All ends of the cables were reseated and checked a lot.
> There's still lights on the card edge; the green DC-OK led, and some red
> ones.
>
> But the hex display (and serial console) is totally a no show.
>
> At MC6810's suggestion I'll check the voltages& scope the PSU when I get
> home, but the LEDs on the front turn on and DC-GOOD is among them.
>
>
> On Tue, Apr 16, 2013 at 10:25 AM, Mouse <mouse at rodents-montreal.org>
> wrote:
>
> > > [...]  Still nothin' on the hex display. :(
> >
> > Nothing at all?  As in, it's not even lit up?  That's definitely not
> > right; no matter what the data lines are driven as you should get
> > something displayed.  My first suspect there would be unplugged or
> > mis-plugged cables or some such.  (Don't forget to check the cab kit
> > end of the cable too, not just the CPU end.)
> >
> > I don't know the details, but it strikes me as at least possible that a
> > mis-plugged or loose cable could have the CPU thinking it's not CPU 0
> > and it's thus holding itself in reset waiting for some other CPU to
> > tell it to boot.
> >
> > Or if you mean it's just stuck showing F, that has a lot more possible
> > failure modes - it's set to F at power-up and the second instruction
> > executed from the ROMs sets it to E.
> >
> > /~\ The ASCII                             Mouse
> > \ / Ribbon Campaign
> >  X  Against HTML                mouse at rodents-montreal.org
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>
>
> --
>    Ian Finder
>    (206) 395-MIPS
>    ian.finder at gmail.com
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