HI all, new here, just registered.
I'm the audio (and everything-else-tech) guy at my church. We have a BSS PS-8810 (no Cobranet card) in the amp rack, driving some old Micros for the main PA and CTSes for monitors and other stuff.
I picked up an old AMB-5 on Ebay on a whim the other week, the idea being to add a "lecture" automatic mixer for those times where there's a simple event and no engineer can make it. Great idea (the AMB-5 should talk to the 8810 over IQ bus), except it's an Ebay find, which is the source of my problem. A note on top "needs to be checked with laptop" is a big red flag that it's a tech special.
The AMB-5 powers up as best I can tell (the three PS heatsinks are warm and the power LED lights, but I haven't taken a voltmeter to it yet). The backup battery is toast, and there's a fair bit of green corrosion in the microprocessor section of the board, including chip pins. Doesn't respond to RS-232 or IQ. Checking the RS-232 connection in more detail, it's holding CTS low and won't connect even with RTS-CTS looped back to the host computer.
Any pointers on where to look? I'm hoping it's just a power supply problem, which is relatively easy to fix. I'll check the power supply with a VTVM when I get back to it later this evening. If the power supply is good, where should I look next?