[comp.sys.amiga.hardware] 1950 monitor jumps around

jgh1@unix.cis.pitt.edu (John G. Hardie) (11/15/90)

Hi,

Something 'wonderful' has started happening with my 1950 monitor
on an A3000.  Occasionally, the whole screen image jumps.  It usually
moves 1/8 - 1/4 inch vertically then returns to the orig. position.
It does this several times quickly, then settles back to a steady
display for an arbitrary amount of time.  I've tried adjusting both
the monitor and the A3000 display enhancer, with no positive results.

Does anyone know what causes this, and more importantly, how to make it
go away. (This is NOT the pixel jitter on the top scan line - the WHOLE
screen moves).  PLEASE tell me that the monitor isn't discharging
internally.

(Email as my time is limited these days - I don't read news much
anymore)

Thanks
John

-- 
jgh1@unix.cis.pitt.edu

		Who Me?  I didn't say anything.

hood@cbmvax.commodore.com (Scott Hood) (11/15/90)

In article <60498@unix.cis.pitt.edu> jgh1@unix.cis.pitt.edu (John G. Hardie) writes:
>
>Hi,
>
>Something 'wonderful' has started happening with my 1950 monitor
>on an A3000.  Occasionally, the whole screen image jumps.  It usually
>moves 1/8 - 1/4 inch vertically then returns to the orig. position.
>It does this several times quickly, then settles back to a steady
>display for an arbitrary amount of time.  I've tried adjusting both
>the monitor and the A3000 display enhancer, with no positive results.
>
>Does anyone know what causes this, and more importantly, how to make it
>go away. (This is NOT the pixel jitter on the top scan line - the WHOLE
>screen moves).  PLEASE tell me that the monitor isn't discharging
>internally.
>
>(Email as my time is limited these days - I don't read news much
>anymore)
>
>Thanks
>John
>
>-- 
>jgh1@unix.cis.pitt.edu
>
>		Who Me?  I didn't say anything.

Yes, you have a defective 1950 monitor.  Take it back to the dealer you
got you system/monitor from and get it exchanged.  Some of the first
couple thousand monitors had a vertical jitter problem which was later
fixed.  The offical policy on this is to get it exchanged at you dealer.
I would see what the serial number on the back of the monitor is and
only exchange it for a monitor with at least a couple hundred larger
serial number on it.

Regards,
Scott Hood

-- 
--
Scott Hood, Hardware Design Engineer (A3000 Crew),  Commodore-Amiga, Inc.
   {uunet|pyramid|rutgers}!cbmvax!hood   hood@cbmvax.cbm.commodore.com
  "The views expressed here are not necessarily those of my employer!"