Found in the loft of a friends parents and he has gave it to me even though i have no clue how to use it. I have however found some youtube videos of this machine and it powers on and i did test it with a cassette the leds for the mixers all work has audio output so assumed fully working but it may need a service belts etc if it has them as this seems to be a vintage peace of kit. FOSTEX 280 4 TRACK MIXER. Please see my other items. Any questions please ask.