[mythtv-users] another Failed HDHR Prime?

[airdrummer]

recently started getting 100% rec.failure on verizon fios, scan only found 44 
channels, only 8 of which HD (not even all locals i'm paying for)-: some play 
fine, some pixellate badly:-\ fios program guide displays fine in s/d 
hdhomerun_view...channel changes in ~2-3secs, 2;-)

replaced p/s, no change
vz replaced cablecard, no change
vz replaced ont, no change
vz found their c/c Data differed from mine, no change

of course they blame the hdhr...so can a tuner fail on some channels but not on 
others? i'd b astounded if so...