Westinghouse 47 in LCD HDTV

connect it with HD RCA's....then youll have both HD and Working cable.

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I would suggest to leave your directtv hd/dvr box connected the way It is.
The HD Colorstream 1input on your TV should work just fine.
This TV does not have an HDMI input but you can buy an adapter and connect to DVI/HDCP IN and that might be able to get 1080i video resolution on your TV.

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If you can first connect the Fios box via component and that will rectify the issue and still allow HD. HDMI is funny, if there is anykind of communication issues between the TV or the Fios box you see what happens. You might also call Samsung to see if there is ANY firmware/software updated for your TV specifically to fix such an issue with the Fios/Mortorola connection. If there isn't then the issue is the cable box since the TV works ok on HDMI with other devices.

Just reset the TV found out how here: http://www.danielcoburn.com/uncategorized/westinghouse-1080p-42-lcd-tv-hdmi-stopped-working-fix/
Hold the power button for 10 seconds.

are you using an hdmi cable or the red blue and green cables that came with the xbox? if using the original cables there is a switch on them that sets it to HD or standard. hope that helps

Troubleshoot first by self diagnosis

It is worth fixing but you have to replace the power supply. It is a fairly common problem with the Westinghouse units.