Mitsubishi 55" Rear Projection - No sound and volume bar continuosly displayed

Are you sure the TV supports 720p? Many older 55" RPTVs are 480 only. Even with Component. Most older component is only 480

check that you have all three RCA connections from converter to TV, or whatever connections it recommends.

Depends what kind of connection you use to connect Your Didgital converter to TV, If you provide more details I might be helpful to solve the problem. Provide the model number of Your TV. And more details what input you use and what kind of cable/connection.

there is a converter box , where you can connect everything and convert in to hdmi output , you can buy this boxes on the internet or at the redioshack

This tv isn't known for sound problems. First thing to do is to go to the cable box and push the volume up button on the box if there is one. Next thing to do is to try another device that has a hdmi output like a dvd or game system in place of the cable box. My guess is that this muffled sound is somehow caused by the cable converter box. You can try to reboot the box by unplugging the power for 30 seconds, then plugging it back in. If all else fails, you can call the cable or satellite service and have them change the converter box. Good luck, Russmann.

the tv won't do anything untill that volume button on the front is unstuck

reset the tv logic

There is no such thing as a TV driver.
In order to display PC video on a TV the PC must have a TV-OUT function and interface, or you need a VGA to TV converter box.
If your PC has TV-OUT functionality, your user manual will tell you this. If you have, Google "Display PC on TV" and you should find some good articles on how to connect the PC to the TV, and how to change the settings on the PC. NB. even if your PC supports TV-OUT, you may still need to by a converter cable (but not a box).
If no TV-OUT functionality, E-Bay lists some converter boxes from about £15. NB. the much cheaper cables only work on PCs with TV-OUT functionality.

I am thinking that you have a Mitsubishi WS-55311. If this is the case, you will need a converter box to receive digital television signals.

I hope that this helps you resolve your issue.
Thanks for using Fixya
asnowman

Have had bad exprience with RCA converter boxes. The box will lose audio and has to be turned off and then back on. You may want to hit mute during this process, the volume varies from analog to DTV. If you have no problem with analog audio I would look into a different converter box.