Here is some info from prior discussion on this list.  I haven�t fixed my 
one bad dock since I've still got a good one - but the reports seem good. 
 Note the pictures on Max's website if you don�t know what a capacitor 
looks like.

Dean


>>>>> On 5/14/99 10:18 AM, Max Dichter wrote... <<<<<

>I replaced the capacitor in the power supply for a total cost of $1.19  
>It was fairly easy to do.  If you are good with your hands I don't think 
>you should have a problem. Check out Sean Cleary's page on how to do it.
>
>http://zimmer.csufresno.edu/~cleary/computers/duo.html
>
>Max
>Max Dichter, [EMAIL PROTECTED]



>>>>> On 5/14/99 2:49 PM, Greg Hall wrote... <<<<<

>Wally,
>
>    Yes there is a cheep fix. Pull the power supply out and replace C28. It
>will fix your problem. C28 is located on the PCB beneath where the AC cord
>plugs into the power supply. Also, the power supply case is riveted shut, so
>you will need to carefully drill out the rivets, and put screws in there
>place when you are finished. To take the dock apart, first remove the top
>cover by placing your thumbs into the dock (where the duo slides in), you
>should be able to feel and see where to push two tabs in. Push the two tabs
>in at the same time, and lift the front of the top cover. It will then slide
>off. Next, take a slotted screwdriver and look for two holes in the now
>exposed dock area. One hole should be in the middle, and the other to the
>right. There is a captive screw at the bottom of each hole. Unscrew each
>screw untill you can push the screw down, and it springs back up, and feels
>kind of  loose. This will allow you to seperate the dock platform and main
>PCB from the bottom half of the dock. Unplug the supply from the PCB before
>you lift that section out, or it won't work. The power supply connector can
>be identified by several red and black wires going into a white connector.
>There will also be a few other color wires as well. Once you haver done
>that, and seperated the middle section from the bottom, you can see the
>power supply. there will be two tabs in front of the power supply which you
>must push down and slide the poweer supply forward at the same time to get
>the power supply out. NOTE!!!! make sure the dock is unpluged from the wall
>when you do this, or you might get a nasty surprise. C28 is a 100uf 25V
>capacitor and is available from Radio Shack for about $0.99. I have used a
>100uf 50V cap with no problems. If this is too much for you. Media Guide is
>offering a power supply for the Duo Docks for $29.00 with exchange. Or if
>you want to ship it to me, I can do it for $10.00 plus shipping, as I
>already have all the necessary parts and equipment to do the fix.
>
>Greg Hall
>Greg Hall, [EMAIL PROTECTED]

>>>>> On 9/24/99 7:20 AM, James Taylor wrote... <<<<<

>I have this problem and just ordered a replacement power supply. I have no
>fear of soldering (in fact I successfully clock chipped my IIsi) and the
>Radio Shack is just up the street. Does anyone know of a diagram or photo
>of the inside of the power supply showing where the capacitor is located? I
>might as well fix my old one so I'll have a spare.
>
>JT
>
>-----Original Message-----
>>
>>>I've fixed three docks. It's capacitor C28 in the power supply. It's a
>>>100uF 25VDC electolytic capacitor....try Radio Shack .....could use up
>>>to 50VDC as a repalcement.
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