Accuphase DP-78 doesn't read SACD layer

I have a Accuphase DP-78 SACD player that will play pure SACD's, CD's, and will play the CD layer on a Hybrid SACD but no longer picks up the SACD layer. Has anyone come across this? I tried air blowing the inside was not successful.  Any Suggestions? or can you suggest a reputable NJ or metropolitan area repair?  

I am an authorized Accuphase dealer on the east side of the Hudson. My E.E./P.E. repair person maybe able to help you out. Is the unit a US Axxis import or from another country? If the unit no longer under warranty or comes from another area please get in contact with me.

Sorry just noticed your post!
Hopefully the Accuphase dealer can square you away but if not you may want to contact Music Technology in Virginia.

Bill Thalmann is excellent and has fair pricing.  He modded CJ tube gear for me years ago and I know he or he has a tech that works on sacd/cd players.

By all accounts the Accuphase is a deck worthy of keeping in service and functioning.

Good Luck 
Have not made any progress on this.  Still searching for help and reputable assistance.  
"Ivanj"  member can you provide contact information on your dealership for assistance on servicing Accuphase DP-78