[sebhc] H89 Power-up problems.

Jim Battle frustum at pacbell.net
Sat Jul 8 17:27:33 CDT 2006

> -----Original Message-----
> From: sebhc-bounces at sebhc.org [mailto:sebhc-bounces at sebhc.org] On Behalf Of
> Mark Garlanger
> Sent: Saturday, July 08, 2006 4:11 PM
> To: sebhc at sebhc.org
> Subject: RE: [sebhc] H89 Power-up problems.
> It appears that the problem is the keyboard encoder chip. After a couple of
> key presses today the screen went crazy... multiple 'H:'s on the screen,
> then garbage, shift-reset not working then shift-reset working... Nothing
> consistent.  
> Any idea of a work-around since I'm guessing that the encoder chip is
> no-longer available? Or should this just be my spare parts machine? I did
> acquire a loose terminal board, but looking at the condition of it (not sure
> of it's history), there is no chance that the chip is still functional. 
> Mark

I have a dead h89 carcass -- if you want me to pull the chip and mail it 
to you, let me know.  For that matter, if anybody needs a CRT and wants 
to attempt a transplant, let me know.  Or miscellaneous parts, like 
keytops.  It doesn't have any floppies and the logic boards appear dead, 
although I haven't attempted to figure out if they are all dead, or 
there is a single point of failure, or something between.  I have a 
vague recollection that when I got it I was told that the machine smoked 
at one point.

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