Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!hood
From: hood@cbmvax.commodore.com (Scott Hood)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Minor display enhancer problem
Message-ID: <13802@cbmvax.commodore.com>
Date: 14 Aug 90 17:56:06 GMT
References: <32765@cup.portal.com>
Reply-To: hood@cbmvax (Scott Hood)
Distribution: usa
Organization: Commodore, West Chester, PA
Lines: 39

In article <32765@cup.portal.com> davids@cup.portal.com (David Kenneth Schreiber) writes:
>Well, I've gotten the overheating and RAM problems solved, but there's one
>more minor problem that I'm having:  sometimes, when doing a cold boot the
>deinterlaced image has garbage overlayed over it and has a general purplish
>tint.  Shutting off the computer and turning back on about a second later
>gets rid of it every time.  Turning it on any time after ~1 minutes results
>in the screen garbage, but again it is cleared using the above technique.
>Any time that the display-enhancer is not used (the productivity modes, or
>when it is switched off), the display is garbageless.  It is also free of
>any problems when the display is simply scan-doubled (eg. a 640x200 screen);
>dragging that non-interlaced screen down to reveal an interlaced screen does
>bring up the garbage.  It happens under both 1.3 and 2.0.  I've also check
>the cable half a dozen times;  I'm sure it's not that (this problem never
>showed up on the 3000 I had replaced).
>
>What I'd like to know is:  does this sound like a problem with the Amber
>chip?  If so, I'd be inclinded to just let it ride (it's not really a
>hardship) until I take the machine in to get the 2.0 ROM upgrade;  I'd
>have my local dealer replace Amber at the same time.  If it sounds more
>serious, I'll make the trek to the dealer that I bought it from (1 hr.
>away, plus the time needed to remove the extra hard drive and 3Mb of RAM
>I've added and reinstall it all in the new machine) and get a replacement.
>
>Thanks in advance for your advice & suggestions.
>
>-Dave Schreiber at davids@cup.portal.com    "Coffee, Darling?"

Dave,

Have you tried adjusting the fine-tuning control as outlined in the
"Introducing the A3000" manual?  I would bet that if you follow the
instructions carefully that this will solve your problem.
C
problem.  Please follow the instructions carefully
-- 
--
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!"