[Coco] Is my coco3 dead?

[Henry Rietveld]

Do I need a special tool to pull the GIME?

Sent from my ⑩ Passport SE; not running Android.
  Original Message
From: Francis Swygert
Sent: Sunday, January 15, 2017 9:48 AM
To: coco at maltedmedia.com
Reply To: CoCoList for Color Computer Enthusiasts
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

--
Coco mailing list
Coco at maltedmedia.com
https://pairlist5.pair.net/mailman/listinfo/coco