I just thought I'd pass along this experience, in case others can learn 
from it.

I've had this Duo2300c with a Duo Dock Plus for about a year and a half.  
I recently decided to install a 4GB HD in the dock, so I purchased the 
necessary parts (dock HD installation kit) and put it in.  It worked 
great, and I was able to load up OS8.6 on the dock HD and run off it with 
plenty of space for everything.  After about 3 months of operating this 
way (seldom use the Duo outside the dock), suddenly the dock would not 
power up.  After some troubleshooting, I discovered that the 4GB HD was 
somehow loading down the power supply, preventing the DUO from powering 
up in the dock. (By the way, it is interesting to note that I could eject 
the DUO, but if I tried to power it up with the dock HD connected, it 
would begin to startup and then would immediately die.
  
In the process of trying to resolve this problem, I bought a replacement 
P.S. off ebay (knowing that this P.S. seems to be designed to be merely 
adequate - no extra "beef").  This replacement P.S. caused the exact same 
symptoms.
  
So now I thought that maybe I have a problem with the dock, so I go and 
buy a DUO Dock-II (wanted to upgrade from the Plus anyway) off ebay.  And 
in the process of moving everything from the DUO Dock Plus to the DUO 
Dock-II, I finally discover the cause of the problem.  

The poser cable for the dock HD is barely long enough to reach from the 
power connector on the dock motherboard to the HD.  In the process of 
installing and routing it, it passes through a very tight spot where it 
can easily get 'pinched' between a couple of posts in the "plastic".  
Well, guess what?  This is CONDUCTIVE plastic (for EMC, I am sure), and 
in my case, the 5V lead was pinched severely enough that the insulation 
on the wire broke through.  So when I tried to power up the dock, at the 
point where the dock turned on power to the dock HD, the 5V PS shorted to 
ground, and the design of the P.S. caused it to 'foldback' and shut down.

So, anyway, I fixed the cable by using electrical tape, and taking better 
care to ensure the power cable was not pinched in the 'tight' location.  
However, now I have a spare DUO Dock Plus (I plan to keep the spare Power 
Supply, just because of its poor reputation).  I am thinking of selling 
the DUO Dock Plus on ebay, but decided I'd offer it here first.  Contact 
me off-list if you are interested.

Regards,
Joe Getchel


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