Watching tv about 30 min.screen went black, “no signal” message pops up. I checked input, cables, even swapped cable box with another tv, changed hdmi cable, nothing works, Any suggestions?

SOURCE: My 40 inch Samsung LCD TV was working fine then

Try a new HDMI - I had a cheapo from walmart and I tried a Monster HDMI and it worked beautifully

SOURCE: HDMI only works after warming up??

The HDMI inputs do a lot of hand shaking and while hand shaking they sometimes miss the grip. It is all about data and communication not being seen or understood. Sometimes it is a Software issue and the TV and or Dish Box needs the HDMI Software upgraded if available for the respected models. If the Component cables work well and they should, I would just use them. The picture quality is just as good and it works every time.
Hope this helps,
Sky Assoc

SOURCE: Intermittant Audio with Yamaha RX-V465 only from cable box

I have the same receiver... You can try pressing the Option button and choosing Signal Info to see what audio signal the receiver sees and if that changes over time. Maybe the cable box is not outputting according to specifications... TV can live with that, but receiver maybe can't.
You can also try to connect the cable box via SPDIF cable (optical or coax) to see if it helps or not.

SOURCE: HDMI input does not work

Hi


Thanks for using FixYa. Two things may cause the “No Signal” message to come up are - no data available for closed captioning and a weak signal input. Your TV is in the Closed Captioning Mode. To turn it off simply bring up the on screen menu and scroll down to the part that says closed captioning and turn this function off! With the closed captioning block displayed and the program being viewed is not sending out closed captioning signals the TV will display, No signal!
I’ll suggest you to run the HDMI from the PVR (personal video recorder) directly to the TV (mute the TV), and then run the optical audio from the PVR directly into the receiver's optical in. The closed captioning is something that is addressed in analog broadcasts, but not necessarily digital broadcasts. Try using Component cables if this doesn’t make a difference. After using components cables the issue will be resolved. Please do accept the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

SOURCE: only av input is working LG 42LC7D TV

I may put money that some one did stole your internal cable from the power supply to the main board !

Don't be surprised they did it to me at LG company .