Suddenly.
none of the 3 remotes I have for my beloved Beomaster 5000 is working. 
Recently my son got ahold of the MCP and I was wondering if he somehow
disabled the Beomaster from communicating with the remotes?  Hopefully
there is a code...
 
If not, I do have an older
Beomaster 5000 of which I could possibly harvest for parts to fix the
unit.  Any advice will be appreciated.