You will have to go into the roku settings and change the resolution to one that works with your tv
if your roku has rca jacks hook it to that temporally so you can see a picture on your tv to change the setting
SOURCE: Samsung HDMI issue
Have you try to replace your HDMI cable?I recommend you to pick up a good Monster HD700 HDMI cable from a local retail store like best buy or circuit city.In case it isn't the cable problem,you could return it.
However,when you are a using the HDMI cable,it is normally either have both picture and sound or nothing at all.Are you sure you didn't hook up the audio OUTPUT from your TV back to a receiver input?
Or even an optical output from the TV to the receiver?
solutiondoct
SOURCE: invalid format
the comp is set to an unsupported screen res. set it to 640x480 and try again.
SOURCE: hd tv doesn't work at all says invalid format
is the tv 720 or 1080. it wont work if your inputing 1080p to 720p or 1080i
SOURCE: LG 50inch Plasma received loud sound then went black
My friend's LG 50" plasma tv has the same problem and it cannot light up. The picture and sound are working fine. But the brightness is too low. It is purchased 2006 too and out of warranty. So I opeend up and found 9 capacitors 3300uF 10V on the power module at the middle of TV are popped. I am planing to replace all of them. They are available at digikey.com. I think this model's power module has design flaw. The cap rating may to low. 10V? Stay tune to see what happen after I change the all the caps.
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