I have a pair of ADA MP-1 preamps that I’m making repairs to. One is a unit that functions well but has the rear input jack and headphone Jack broken and needing replacement. It is a version 1 unit with the top mounted input switch. The second unit is brand new to me, just came in the mail today and I’m having a few problems diagnosing the issues it has. It is a version 2 model without the top input switch. Upon arrival the unit was apparently doa, wouldn’t power up at all. I cycled the switch several times and the unit now comes online and goes directly to the clean indicator lit and the numeral 0 on the display, no self check, no ada or model or program information, no leds on the panel light during startup or with buttons. Preset buttons do nothing, I can however press combinations of buttons like the arrow keys, treble, and one or 2 other buttons and it will illuminate several leds along the strip above the buttons but does nothing to change presets or other parameters. I don’t seem to be getting audio out of the unit either. The battery is stone dead (original soldered in unit) and I plan to replace it with the battery mod during repair just trying to see where I stand before going in depth on other issues. EPROMM chip is version 2.01. Voltage through my Furman pl-plus dmc reads a solid 125 volts. Any help you can provide me in troubleshooting these issues is greatly appreciated.