hey guys. I have three DPDMX20L dimmer packs and two of them have jumped the shark and no longer work properly. I turn them on and the LED display flashes "A0". If they're are lamps connected to them they flash and behave strangly as you move the faders. One started this a few years ago and a second just started last weed. up till then they where working fine. What's the deal? Are they toast? Anything I can look at? I don't mind climbing in and replacing chips or resistors.
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