Re: IIe Display problem (add'l info)

["Donald C. Lee" <coach41@pacbell.net>]

Thanks David,

    Thanks for your insight.  It's a moot point right now anyway.  I
guessed it was a chip and I tried to pry one of them off the motherboard.  
Well, I did a poor job of it and the some of the connectors were snapped
off.  Oops.

    So now I have a bootable IIe that won't display a thing.  Oh well, not
too thrilled about it, but my IIe was not exactly in great shape
anyway.  For a few years it wouldn't boot at all and the only way to get
it to boot was to like the IIe off the table a few inches and let it
"bounce" and then it would boot.  I probably screwed the circuitry or
chips a bit that way.  

    At this point, my IIe has officially become a collector's item.  I'll
keep it around and hope it boots when I am 60 so I can show my grand kids
how a real computer worked.  :)  Now I have to think about how much I
really want to run my II programs.  I may be in a market for a used IIe.  

Don

|~\ _  _  _ | _|  |  _  _              coach41@hotmail.com
|_/(_)| |(_||(_|  |_(/_(/_     http://www.geocities.com/smcoach41
Apple II user since 1983     "Our Hearts: Some people come into our lives
and quickly go.  Some stay awhile and leave footprints on our hearts and
we are never the same."


On Tue, 25 Dec 2001, David Empson wrote:

> Donald C. Lee <coach41@pacbell.net> wrote:
> 
> > The text is displayed is displayed "double" (ie AAppllee IIIIee) during
> > bootup and as well as time programs are running.  The Hi-Res graphics
> > display is also screwed up.
> >
> > I ran Appleworks through my IIe and it works fine.  So the problem with
> > my display seems isolated to the 40 column display.  Any suggestions by
> > anyone on what to look for?
> 
> It sounds like there is a fault in the video circuitry which is forcing
> the output to be displayed as if 80 column mode was active, even though
> it isn't.
> 
> Your hi-res graphics problem is likely to be the same - the hardware is
> forcing the screen to operate in double hi-res graphics mode, even
> though the software thinks it is in single hi-res graphics mode,
> resulting in garbage or duplication for seven out of every fourteen
> columns (assuming monochrome output).
> 
> I'd need to review "Inside the Apple IIe" to narrow the problem down
> further.  
> 
> It might be as simple as a dry joint or short on the logic board, or it
> could require a chip to be replaced.  Without deeper research, the most
> likely candidate is the IOU chip, which is one of the 40 pin custom ICs
> in the IIe.  If I'm right, then the only way to fix it would be to
> replace this chip, and the only convenient source would be a matching
> IIe.
>