Shanling CDT-100 Technical difficulties

Recently, I posted a thread about my problems with my CDT-100 remote. I finally disconnected the whole unit and took it back to the place of purchase. Wouldn't you know it. Everything worked perfectly. Upon its return, it worked fine for about one day remote and all. Now the remote is not working and I get no output from either the tube or solid state outputs? This unit is pristine condtion and handled with kid gloves, just like everyone else on this site. I don't know what to do. I use an Audience PC into a PS audio strip. I have also tried turning the unit on and off to relieve static BU. no luck. When the remote was working I switched back and forth from upsampling to std redbook, that used to work. Now I can't use the remote. HELP!!