VAX 4000-100: diode 4 on and no OPA0 access

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Article #15891

#15891

From: Didier Morandi
Date: Thu, 12 Apr 2001 05:30

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(extracted from fr.comp.os.vms, cross posted to comp.os.vms)

Subject: MicroVax 4000
Date: Wed, 11 Apr 2001 19:51:18 +0200
From: "Nico" <pubs@netcourrier.com>
Organization:[Posted via] Easynet France
Newsgroups: fr.comp.os.vms
References: 1 , 2

I have a "new" hobbyist VAX 4000-100 at home. When booted, I can't access OPA0
from my PC. No nothing. I use Reflexion. I am sure of the cable and settings. I
tried all speeds. I believe that there is a material problem. There are diodes
in the back and it leaves diode 4 on. I looked on a VAX in production here in my
office and there is only the large diode which is on. Where can I find details
on these diodes and how can I have this fixed? 

Thank you.
Nico (Paris)

Translated with BabelFish (with a little help from a friend)

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