Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!rutgers!cbmvax!hood
From: hood@cbmvax.commodore.com (Scott Hood)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Jittery A3000 Video
Message-ID: <20144@cbmvax.commodore.com>
Date: 27 Mar 91 00:13:24 GMT
References: <12870002@hpsad.HP.COM> <14760@mcdphx.phx.mcd.mot.com>
Reply-To: hood@cbmvax.commodore.com (Scott Hood)
Organization: Commodore, West Chester, PA
Lines: 40

In article <14760@mcdphx.phx.mcd.mot.com> vfg2@phx.mcd.mot.com writes:
>In article <12870002@hpsad.HP.COM> paulc@hpsad.HP.COM 
>(Paul Christensen X3073) writes:
>
>>Anyone out there having video problems with the A3000?
> 
>>I have noticed that when I first fire up my A3000, the screen jitters 
>>for a few mins, then seems to stabilize after a while... Ever seen this?
>
>I take it you're not talking about the well-documented 1950 screen jitter
>problem, where the whole screen bounces up and down in unison at random.
>
>My 3000's video looks wavy at powerup, i.e. some lines are bent horizontally.
>Is this what you mean? If I cycle the power, it does not recur. It only
>happens when the 3000 is cold.
>
>It goes away within 30 seconds for me. Believe me, I'm keeping an eye
>on this! If it gets any worse, into the shop she goes!
>
>Yours is the first post I've seen that sounds like someone might have
>the same trouble I have, but I've only been an Amigoid :) for 3 months...
>
>---------------------------------------------------------------------------
>                  Dan Quella, vfg2@phx.mcd.mot.com
>     Somehow, someday, we need Just One Victory, and we're on our way
>____________________________________________________________ - Rundgren ___

Make sure that you first try the fine-tuning adjustment for the A3000's
display enhancer as per the user's manual.  Sometimes if the fine-tuning
is just on the edge of correct operation, you can experience a jittery
display (horizontal only).

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!"