Osbourne 1 problems

From: Gary Hildebrand <ghldbrd_at_ccp.com>
Date: Mon Oct 14 14:40:00 2002

Sark wrote:
>
> I recently accquired an Osbourne 1 computer. I turned it on and it
> seemed to work, I was able to boot BASIC off of a floppy and I wrote a
> couple little programs, (print hello world, count to ten, and count
> forever, stuff like that). The picture on the screen was kinda dark in
> spots, and while the computer was counting, it flickered to a very dark
> and barely readable, then it went black all together. I tried turning
> up the brightness and contrast controls, the only one that makes any
> change on the screen is the brightness control. I can see the rasters
> when the brightness is up all the way, but the contrast control has no
> effect. The computer seems to still work though, I can turn it on, then
> hit enter and it will boot from the floppy. Previously, when it was
> working, I noticed the screen flicker when the computer accessed the
> floppy drive. My guess is that there is something wrong with the power
> supply. Does anyone have any ideas? I would really like to get my
> Osbourne working again, it's a really cool little computer.
>
> Thanks!
>
> Ian Primus
> ian_primus_at_yahoo.com


Well if you see the raster then the PS is okay, looks like something
died in the video output. I remember Sams made a computer photofact of
the Ozzie 1, sounds like you need a copy to do some trouble shooting.
Now if you have had a mod on the front panel for an external composite
monitor (phono jack) all you would need is a composite NTSC monitor to
plug into the Ozzie. That would tell you if the video output circutry
is okay or not.

Gary Hildebrand
St. Joseph, MO
Received on Mon Oct 14 2002 - 14:40:00 BST