Norstar Horizon Repair - Serial Ports

[TRS80]

Trying to get the blog up to date with repair write-ups.... this one is only 6 months late. Hope it helps somebody.

http://www.quicktrip.co.nz/jaqblog/home/107-blogns

[tezza]

Nice blog. Documenting these experiences are invaluable. Thanks for linking.

[SpidersWeb]

I love these types of repair posts, you can learn a lot - not just about the computer design itself, but also the logical thinking process that leads to a diagnosis and repair.
Thanks for the write up.