[Coco] Is my coco3 dead?

[Spencer]

Frank thanks for sharing the link to the Little Wonder.


      From: Francis Swygert <farna at att.net>
 To: "coco at maltedmedia.com" <coco at maltedmedia.com> 
 Sent: Sunday, January 15, 2017 9:48 AM
 Subject: Re: [Coco] Is my coco3 dead?
   
Date: Sat, 14 Jan 2017 22:50:02 +0000
From: Henry Rietveld <rietveldh at hotmail.com>

My spare coco3 won't do anything when I turn it on. No video displayed thru RF. , RGB via my cm8, or comp out.
Where should I start looking?
===============================================
Most likely something in the power supply, but it could be a dead 6809 (you usually get garbage on the screen though) or some corrosion on the memory or GIME chip pins. You can try pulling and reseating all of those, just be careful with that GIME and don't break the socket. 

The service manual is a great tip, but you can find everything you can do with a volt/ohm meter and some suggestions for replacing the power supply in "Tandy's Little Wonder". Lots of other info and history about the CoCos in there also. 
http://www.colorcomputerarchive.com/coco/Documents/Books/Tandy's%20Little%20Wonder%20Second%20Edition%20(Farna%20Systems).pdf
 Frank Swygert
 Fix-It-Frank Handyman Service
 803-604-6548

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