An update, which I hope will be helpful to others.
Sourced a replacement membrane, and now she works as she should. Also replaced the SMD fuse on the inverter board, and it works also. I was able to de-solder the old fuse, and solder in a replacement (I used
https://tinyurl.com/ycdcxm9p) with a regular iron with a pointed tip and a tweezer. It really wasn't too hard, and if I can do, likely anyone can do it. Only thing is, It is dimmer than the other CMU200 I have, so I think the reflector has curled around the tube as has been suggested elsewhere, or perhaps the glass is discoloring along with the curled tube. Gonna consider using LEDs.
Now, for the ask
I know I have several options and cards that I don't need. Anyone know of a list, and perhaps a how to/diy on what can be removed, and how? I know I have B83, because when the unit boots, I get a message about initializing B83, which lengthens the bootup significantly. So, I wouldn't mind paring down the un-eeded/un-useful options and cards.
Thanks for all the suggestions and help,
Michael