I have a question related to testing transistors. Going with the method described here, if I an testing and come across one which which I hear "tone", however retest it, and hear no tone....what gives? Is it going bad? Operating normally? 99 % of them have not tone what so ever. What would temporary show a short but upon retesting it, it's ok?

Ok, thinking through a mod idea for the machine. I previously acquired the Playmates 1701 Enterprise, I took it apart and put leds inside. Monster pain in the ass. Results were so so at best. Anyone who has tried this knows what I am talking about.

I was considering getting one of the Bluetooth Speaker Enterprise 1701-D ships, which has LEDs already installed. Here is the issue, wiring it to operate from external power, instead of battery power. Also to come on when power is applied, not by hitting a button or anything. thoughts?
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