VAX 4000 model 500.
rodsmallwood52 at btinternet.com
Thu May 26 00:17:22 CDT 2016
On 25/05/2016 23:43, Antonio Carlini wrote:
> On 25/05/16 01:30, Rod Smallwood wrote:
>> On 24/05/2016 22:41, Glen Slick wrote:
>>> On Tue, May 24, 2016 at 2:29 PM, Rod Smallwood
>>> <rodsmallwood52 at btinternet.com> wrote:
>>>> My main system a VAX 4000 Model 500 with a KA680 CPU has just
>>>> halting at test 51 on power up.
>>>> Does any body know where I can lay my hands on a spare KA680?
> The system maintenance manual claims that ?51 means "NOROM No valid
> ROM image found", which seems a bit odd.
> But that's a VMB message, so unless it was trying to boot then perhaps
> I'm looking in the wrong place ...
Thanks its now OK - The latches that hold the CPU board in are
not a good design and the board was making intermittent contact.
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