Technics SU 800 amplifier - sudden no output


Active Member
I bought this new in 1989 along with a few other Technics separates. Now I am unable to get any output at all regardless how I push and twist the speaker wires into the twist and turn connections. The amp still clicks and shows the yellow security LED after a few seconds which I think is some kind of test to check for output so don't quite understand what is wrong. Maybe someone with exactly the same amp had this same issue ?


Distinguished Member
Try and obtain the user manual and that should tell you what the LED colours mean.
It's possible it's indicating a short-circuit in the speaker output.

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