[Coco] Broken CC3

[George Ramsower]

----- Original Message ----- 
From: "George Ramsower"

> Darn,
>
> My CNC coco broke.
>
> It starts up and displays the usual stuff. I can ?mem and it reports 
> correctly. However, when I boot OS9, it crashes.
>
> I appears to crash when it loads the first boot sector.
>
> I tried other boot disks with the same results.
> I replaced the CPU, RAM board, reseated the GIME, polished the edge 
> connector on the disk controller, reseated the ROM in the controller  and 
> all gives the same results.
>
> Suggestions?
>
>
> George

 I should have done this earlier...

 I looked at the power from the switching supply and there is WAY too much 
high frequency noise on them.
 Tonight, I will take the supply out and find the bad cap/s. I betcha that's 
the problem.
What made me look was the fact that the computer seemed to work okay until I 
try to access the disk. Then it crashed.
I did a "dir" in RS basic with nothing in the drive and the computer 
crashes.