My unit has power, but it won't turn on at all.
This means that something is seriously wrong with the unit(blown amp, shorts, opens, etc.) however, you can reset the unit by unplugging the unit, holding the A and B channel buttons on the face of the unit and plugging in the reciever. the display should flash at 1 second intervals. if it doesn't stop flashing on its own then unplug and replug and you should be good to go! good luck.
Put new batteries in my vivitar avto thyrirtor-2800-d
put batteries in right position but does not work
I put in four new AA batteries, and the unit would not turn on. It had been sitting in a closet for years prior to this happening. I was working fine the last time I used it. I made sure all contacts were clean of any dirt or obstructions, but unit will still not turn on.
vivitar auto thyristor 2800-d, noo flash new batteries.
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