Emu XL-7 & MP-7 User's Group

Hello everyone. I am new here and I am happy to have found this group. Just reading lots of the older posts have help me a lot.

I however have a major problem. I have the PX-7. I have also installed the XL-7 and Phatt expansion ROMs.

However, I am getting no sound all of a sudden from the unit. Not even the factory installed ROM is giving any sound. When I go to presets, I get a "not installed" message or Instrument ROM: ?????? and under that "not installed. I do know they are installed. To be sure, I opened it up and made sure they were seated properly. I even took them out and moved them around. Nothing helped. The message was the same. The ROMs are properly installed. 

I have a local repair store down here in Virginia who have told me they will look at it, but at $95 an hour, I want to make sure it is not some setting I have accidentally set that is causing the issue. I would appreciate any help in solving this issue.

Thanks.

Rick.