Path: utzoo!utgpu!watserv1!watmath!att!linac!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!ncar!noao!stsci!kyp
From: kyp@stsci.EDU (Mark Kyprianou)
Newsgroups: comp.sys.amiga.hardware
Subject: 1084 Blanking Problem
Message-ID: <2054@stsci.EDU>
Date: 26 Nov 90 14:47:57 GMT
Organization: Space Telescope Science Institute, Baltimore, MD 21218
Lines: 27

PROBLEM:
I have a 1.5 year old 1084 monitor that has a blanking problem.  It always 
popped, but recently it developed the blanking problem.  When my monitor 
blanks out, it stays blank.  Sometimes I can get it to recover by tapping 
the side of the monitor.  Othertimes, I have to turn it off for a couple 
of hours.

THINGS I HAVE TRIED:
I tried cleaning it, but it was not very dusty because I keep it covered.
What area should I concentrate on cleaning?

I opened it up and looked for cold solder joints.  I found one potential bad 
solder joint, but it did not fix the problem.  There is a large PC board on 
the bottom that is covered by a shield plate.  I have not removed this plate
to look for bad solder joints or dust. Anyone ever hear of this shield plate
shorting out the monitor, there is not much clearance between the PC board,
the ?plastic insulator? and the shield plate.

SPECULATION:
Is there a design flaw in the monitor?

Any info would be greatly appreciated.

-- 
                      Space Telescope Science Institute, Baltimore, MD 21218
        Mark          ARPA: kyp@stsci.edu  BITNET: kyp@stsci  SPAN: STOSC::kyp 
    Kyprianou         UUCP:   {arizona,decvax,hao}!noao!stsci!kyp