Lexicon MC-12

Thank you. I also saw that on Ebay. Logitech Harmony is listed as working with the mc-12, but if I dont need the remote, I actually dont mind getting up off my rear and accessing the panel. Just cannot figure out how this thing works. I downloaded the manual but everything is written as if you are using the remote.

It looks like remote central has codes for it. You should be able to get a Harmony remote or something similar and program it. Try searching the harmony forums and see if there are already codes for it.

Just very recently sold my very very nice MC12B with all the accessories. I can tell you that a remote is highly desirable in setting up the unit. It can be done on front 
Panel (as far as I know) but it's nearly impossible and cumbersome in the extreme. I tried once and failed miserably. Just wanted to change a speaker distance. And i was very familiar with the menu and manual. In its day it was highly sophisticated and has many menu and setting levels. I do NOT recommend attempting to set up this unit from front panel you can really screw the pooch so to speak in a heartbeat. My suggestion to you is to find yourself a remote and read the entire manual at least 3X. Its a very thick manual. Use the OSD which will simplify you setup immensely. Once you accomplish that you'll be surprised by what this processor can do.
Hope this helps!

Also to reset the unit to factory settings is a 2 man operation unless you have very long fingers. If you need to reset I can give you the instructions on how to. It's not in the manual.

I'm not surprised that you are having connection issues as every input must be specifically set up individually and has 3 options, coax, opt and analog. If the input configuration is not how your source is connected you will not hear a thing. Same for video. As you can tell it has a lot of inputs so to happen on one that matches your connection is a crap shoot.  I cannot remember if the manual specifies the default setting for the inputs. If it does you may want to reset to factory settings and use the default connection.
Hope you get it working and happy listening.