Blank screen, no sound

Your LED backlights

Nothing is forever or for free, suggest you donate it or recycle it.

There was a software update early this morning which caused your recvr to go to recovery mode until it downloads the new software which takes about 4 hours. Once this is done you should be just fine!

hmm confusing but try turning your ps3 off at the wall give it 5mins and try again if nothing happens try it on another tv

I have the same problem - its a HDCP handshake issue. Sony says the firmware in the Westinghouse TV needs to be updated - Westinghouse says that they have firmware updates for some models depending on your TV's serial number, otherwise they are working on firmware updates for the rest of us that should fix the problem. Call Westinghouse to see if you can get updated.

Try to unplug the power for a few minutes and plug it back in. If it still not work then the main board has gone bad. Replace the board will fix it.

The TV or converter box might have lost the cofiguration for the converter box

I'm assuming your screen shows nothing at all, even the bios or boot screen as it turns on.

If you can hook it up to an external monitor then your video adapter is working. Try using the vga output on the laptop. If it doesn't show anything use you display select feature. I'm not sure what button it is on your laptop but on mine it is Fn+F8 (look for a button that shows a laptop and/or a rectangle).

If you can see it with an external monitor, you should try to uninstall and reinstall the video adapter. After you reboot the computer hopefully it will work.

However, if it still does not work, you will probably need to reseat the monitor cable. Do this by opening the screen panel. on the back is a flat cable tat plugs in to the LCD. This is usually covered by tape. Carefully remove the tape, unplug the cable and plug the cable back in. Don't forget to replace the tape!
I have fixed two computers in the last two weeks by reseating this cable.

Hope this helps and good luck!

TV STARTS UP AND GOES BLANK SOUND NO PICTURE

There any number of problems that could have caused the shut down. Depending on how old the set is make your decision on whether it would be wiser to replace it