Levinson No 39 fussy about cds


I have had a Levinson No 39 cd player for more than a decade.  It won't play many new CDs...a longstanding problem with some hybrid SACDs, but more recently with standard red book cds.  Never  had a problem with older cds.  Have reset drawer without success.  Any suggestions?  Harman is no help.  
dorrman8
Thanks for the leads...I think I'll start with the cleaning...dusty and salty here on the coast.  However, I suspect it's the encoding given how selective the problem is...still plays 99.99% of my catalog without fail.

Mark
what are the (2) authorized ML repair centers?

Keep me posted & Happy Listening!
Thanks for checking in.  Have not yet cleaned the lens...will post when I have a result

mark