Speaker cover needs to be cleaned-what can i use?

Remove back panel and clean the lens's it worked for me

You will have to remove all the screws on back of TV Front Bottom panel first then you will have more screws that hold Top on in back and under front screen its not as bad as it sounds it just takes awhile to do while your in their clean your mirror and all 3 top lenses to Tubes.

one thing to check is to see if your model has a speaker swith on the rear panel and see that it didnt get bumped to off
other wise check speakers in the menu to see if there turned off
if not there then you will have to trouble shoot the small signal board

Unplug the TV.Remove the back cover.Gently wipe the three guns and the white screen.Reasssmble.By the way vacuum the chassis while you there

We ended up taking the front off cleaned and rescrewed it

Your TV is overheating.. easiest remedy is to point a fan at the back of the TV or... clean the inside of the TV, Im sure its full of dust and stuff... this prevents air circulation inside the TV thus creating more heat...

The outer screen is a protective screen. it is just glorified plexiglass. just use a soft cloth slightly damp.

the screen on my hdtv has alot of marks on it how do i get another

TV: Viewing Screen RPTV - damage and maintenance

  CRT Rear-Projection - Before you can begin cleaning, you need to determine if you do, or do not have a screen shield. A screen shield is a hard plastic cover over the front of the TV screen. If you can't tell, give the front of the TV a light tap. Another way to tell is to check for ridges in the screen area. If you can feel ridges on the screen, then you do not have a screen shield. Rear projection TVs without a screen shield require a special kind of cleaner and rag. These are available for purchase at your local TV service center. Those that do have a screen shield should be cleaned with a dry or damp soft cloth. If it's extremely dirty, a mild soap may be used. Do not use paper products, such as paper towels, to clean the screen shield. Paper products can easily scratch the surface of the shield. Screen shields can have a tendency to streak while cleaning. If this happens, use a dry cloth and buff the screen in a small circular motions.