Hi there! I have a Technics Tuner Amp Model: SA-EHS70 which has gone dead. There's red LED indicating that the power from the wall socket is present. I tested the power supply environment but found no fault. Before the equipment stopped functioning, it had a problem with sound, a distorted sound. Now when I switch it on, I can only hear the click of sound from the speakers only once and that's all. Every time I swicth the power button I will hear that sound and the LED will remain on with no display on the panels.