Power confirmed. Sound output is possible. The AUX lamp is off. We are selling this as junk. Yamaha A-5D stereo amplifier, with bass and treble adjustment functions, a high-quality audio device with multiple input terminals. - Brand: Yamaha - Model: A-5D - Features: Speaker A/B switching, headphone output, bass and treble adjustment - Input terminals: Phono, Tuner, AUX, Tape 1/2 - Power: ON/OFF switch - Volume: Large volume knob Thank you for viewing.