Tech Help: Who is repairing Defender boards?

I know the old Williams stuff pretty well. What are the symptoms? Have you checked the power supply voltages and connectors? They have a bad habit of burning up. That is usually my first step; contact Bob Roberts and get a P/S rebuild kit with connectors. It can help to use both ground pins on the power supply as only a single one is connected in the standard harness.

First, are all three LEDs lit on the power supply? Start from there and report back.

Kirk S.
 
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