Osborne One -- No video.

From: Dave McGuire <mcguire_at_neurotica.com>
Date: Mon Jul 16 16:44:11 2001

On July 16, Rich Beaudry wrote:
> I recently acquired an Osborne One, but it seems to be having a video
> problem -- as in no video at all. I did the obvious - played with the
> brightness and contrast -- but still nothing. If I press a key on the
> keyboard, the floppy starts seeking, so I assume the rest of the computer is
> at least partially working, but I get no video output at all. I have NO
> docs or schematics, so it's a bit hard for me to test stuff out. The CRT
> make no noise at all when power is either turned off or on (no static or
> hum, or anything else). Also, I took the cover off, and carefully looked
> inside while turning the power on, and the CRT didn't light up, or have any
> other response.

  No light from the CRT's filament? That's a bad sign. If there's
enough room in there, it might be a good idea to look carefully at the
neck of the CRT and try to identify the filament pins, then check
between them with an ohmmeter to see if the filament is open.

  I have an operational Osborne One here, with the manual...if you want
me to look anything up for you, or do any probing, let me know.

               -Dave McGuire
Received on Mon Jul 16 2001 - 16:44:11 BST