On display is a Numark PPD 1775A Sampler Mixer / Preamplifer Board. I have purchased this item 25 years ago. All inputs and output jacks work. All functions and reverb works. Their is nothing broken on the board. All leds work. A BONUS, white lines on board are not scratched off or faded. I have tested the preamplifier with turntable, microphones, CD players the output to the power amplifier is clear and strong. Equalizer works along with the Reverb Section. In the past, when the Mixer was first turned On, one of the output channels Left/Right wouldnt come on / or have the same output as the other channel, when that happened I just (turn up) the master control left or right side or just turn the system (off/on) again, and both channels will balance or have equal output to left and right channel while the mixer is on. Again, I had purchased the system in the Mid 90s it is VINTAGE and has never been serviced. There is no Warranty of any kind. As - Is! No Returns! The Winning Bidder has 48 Hours or 2 Days of concluding auction to Pay for It