[Elecraft] No stations being heard on K3

[Gary K9GS]

I have a K3, not K3S.  A couple days ago I noticed a lack of signals heard.  I'm hearing static/ band noise just no signals.  I've listened on several bands.. same regardless of band.I went up in the digital portion of the band where there are always signals...I was able to decode a few but the band should have been filled with signals.  On my P3 I'm not seeing anything. I've also transmitted...everything appears normal and even saw some normal looking RBN spots.Any thoughts or ideas on what to look at?  Blown pin diodes maybe?73,Gary K9GS