RU-44SZ51D LG DLP TV

it is def. the lamp. I have the same tv

If the second light is blinking to orange or red, that is usually the lamp indicator light on an LG DLP tv. That indicates your bulb needs replaced, or something surrounding the bulb has failed (like the cooling fan for the bulb for example) IF you have a spare bulb handy, I'd replace the bulb, keeping in mind if you touch any part of a new bulb with your bare hands, you just cut the life of the bulb by more then half.

44 inch lg dlp hdtv no picture or sound press power button standby light turns yellow and then back to red

Bad Light engine call UED for price on rebuilt one if they have it!1-800-648-6657

Go to this site, follow the instructions, and it might fix your problems. I did, and my tv is better than ever!

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

Thanks for the picture - that's a big help.
It looks you have the dreaded light tunnel collapse common to all LG DLP TV's. Inside the light engine there is a square tube made up of four mirrors. These mirrors deform and crack with the heat of the lamp. They fall down over the light aperture and cause a shadow of varying degrees. It is fixable now at a realistic price ( used to have to replace engine) as LG have made the parts available. It would take a competent tech around three hours to complete or if you are technically minded you could do it yourself. I hope this helps.
Hope Ya Fix It!

This could be a problem with the light funnel or alignment of the light engine.
I woud contact a service center for a quote.

it sounds like an adjustment is needed/call for service and a est.$

To do this, press the ENTER button on the TV and the MUTE button on the remote at the same time. After 5 seconds the screen should come up and it will read "Lamp use time...Total lamp use time ....lamp reset" Press the center button on your remote (the circle button right in the middle of the four directional buttons) and you will be reset to -0- again. Your orange light should now be off.

I had the same problem and the fix for me came from updating the driver for my video card which you can get from the manufacturers website