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I would suspect the quality of component converter device...
HDMI is the latest state of the art for HD (High Definition 1080) video signal. Poor cables or poor connectors can cause weird results.
It's best to go from HDMI to HDMI.
If the tv doesn't have a HDMI input then it probably can't handle the newer standard.
Component Video is an old standard for video before we got high definition. It uses three separate wires.
Try swapping the coloured wires around to see the result.
Some of the older Mitsubishi with HD 1080 have only one component input for HD---it is marked on rear as DTV----also a model number may allow me to give another suggestion--Some of these sets (ws, wt, vs models) will on occasion lock out or disable the input/s.
Depending on model number most also have 3 hidden menus---one is the option menu----it allows with the Mitsubishi remote via a 4 digit number (by model number) to enter there and do a hard reset of the set----sets every setting back to factory original---seen it "cure" all kinds of odd problems from missing rear inputs, no sound, odd video issues---you name it.
Get me the model number and I will see if can find the code for yours--you can also try hooking first direct a 1080 blue ray or Dvd if you want to see if the input is active or not first.
Blu-ray players can be connected and used with any Television that has at least Composite video inputs. But the only way to access the high def is through either a HDMI connection or your Component Video connections. You DO need an HD compatible TV to see any benefits of Blu-ray. Check the back of your TV your RCA model should have 1 set of the Syncroscan HD component input jacks and be sure the Blu-ray player has the component out jacks since they are being phased out.
Just be aware of the following:
As of January 1 2011, all Blu-ray players that reach the market will be Image Constraint Token enabled as per the industry AACS Adopter agreement. What this means is that new Blu-ray players will only be able to output high definition content over HDMI. Film studios will be able to embed an Image Constraint Token on their Blu-ray discs restricting the Blu-ray player from outputting the image in HD over an analog output, such as component. Instead, images will be sent over component will be constrained to a maximum resolution of 540p.
The move is part of a strategy that is designed to move consumers to digital-only connectivity so that by 2013 all analog outputs on Blu-ray players will be phased out. Studios have not been permitted to embed this technology into Blu-ray discs prior to December 31 2010, so discs purchased prior to this date will not have their image constrained. However, users will now need to look for the Image Constraint Token on the packaging of Blu-ray discs released after January 1 2011, if they still rely on component out for their Blu-ray player.
First of all, is your blue "HD" light lit up on the front of your Uverse box?
If yes, then you're in HD
If No, you need to check your connections from Box to TV
1.Those Red-Blue-Green cables are for video only, they don't carry sound and shouldn't be connected to audio outs. Audio needs a seperate cable. Make sure your Red isn't on the audio out which is also red. Make sure your blue and green aren't switched with each other either. Check that at both ends.
2. Try an HDMI cable. It will carry audio and video together and it's one cord instead of 5.
3. What brand/model of TV is it? Is it an older projection TV? The HD tuner might be shot. The individual color tubes commonly fail after a few years.
4. Are you selecting 720p or 1080i from your TV's menu or from the Uverse menu? You'll need to set it through the Uverse box, not the TV.
5.Follow -Menu -Settings -Aspect Ratio to change to 720 or 1080. This should start an autotest which will scramble your picture for about 5 seconds, then bring you back to a menu asking you to keep settings or revert back settings. If you never see that question pop up, then your TV isn't supporting the HD, and you settings will be rolled back automatically. If the question does pop up and you can read it, select "keep settings" and press OK. Your blue HD light should come on the front of the box now.
For this unit and the addition of the secuity features of Blu-Ray, the 1080i you set can handle is through the component input from a DVD player or an XBOX. In the configuration menu of the PS3, change the resolution to 1080i and see if your set will reset to it. The 1080i on the Blu-Ray is only possible on the HDMI cable as far as I could find, again due to the security restriction. The Mitsu is not going to run it in 720p due to the PS3 is running component and cannot control sync to this set.