What connection to TV are you using, and how is it connected (any switches/vcr's/pass-thru's)? Have you tried an alternate tv to rule it out?
Then as it was, then again it will be
An' though the course may change sometimes,
rivers always reach the sea
M1000x2,M2000,Twonky 4.3.3 RC1 beta on LinkStation HGLAN400gig,Buffalo whr-g54s on DD-WRTfirmware-luv'in it!