Vizio VF551XVT 55 in. HDTV "loses sound changing channels" Questions

...loses sound on SD just on HD channels. Not the same channels, no pattern present appears to be random.Have tried new HDMI cable, returned TV and got new one! Tried all the HDMI ports. Nothing helps. ...

sound. The picture comes back if you turn the TV off and back on but then loses the picture again as soon as you change channels. Hello, it sounds like your inverter board is goin out on the set, when

changing channels or going from Direct DVR listing, screen goes black and changed channel/program picture does not come on. Sound changes to correct program/channel. Have to turn off TV power and turn

...channels, some times, the sound goes off. The sound comes back only after switching the cable box off, then on again. Is there a solution? power off all units then redo all connections especially if ...

channels so you lose picture and sound. Now, more guessing, you try to put the channel back to 3 on your TV, but still nothing happens. OK, if close so far, there are a couple of things to try. First,

...sound on new sharp aquos +Q TV 60 inch We trust changing channels and back to watched program . No more garbled sound for a while. If you are using an antenna for input, then you are probably ...

...sound and channel changing still O.K.Please advise.Don. You may lose some channels when you retune the TV as the channels have been rearranged. To locate them look at the EPG although you may still ...

...the TV. It should work now with both picture and sound. Hi, Check all connections that they are securely connected (not lose). Change channels. If all is Ok Check for fuses. Call repairman. Good

...loses sound everytime a channel is changed. The box must be rebooted to get the sound back each time. I have no problems with the 4250HD boxes. Any solution? Did you call Scientific Atlanta to find ...