The RED (of RGB) is not firing - Optoma EP738 Multimedia Projector

RGB means Red,Green,Blue it is an old system for supplying video signal to a screen..

Hi Kelly,
I believe the Sony Trinitron WEGAs do not have an HDMI connection on the back of the TV. If they do it would be labeled as HDMI input below that familiar looking HDMI narrow horizontal connector. But I believe what you have is the RGB connector which looks like three round female connectors which are color coated Red Green and Blue. Now these RGB connectors are a form of high definition but it's not a direct connect for for your HDMI DVD player or your XBOX 360 or what ever you want to hook the TV up to.
You'll have to convert you HDMI to RGB. you can still purchase DVD players with RGB outputs but if you already have a device that requires a TV with HDMI, you can buy a converter. Go to RadioShack or BestBuy or search online for a HDMI to RGB converter cable . It should look something like the picture below.
RED GREEN AND BLUE for video. And then the white and red connectors that are banded together are for your audio.
Good Luck

RGB is a term that means the guns in the crt or other display are only driven by amplifiers for that color. So you have to have seperate signals and inputs for red,green and blue. Those come from the source in that method. They are then fed into the monitor for which each of those colors has its own channel and amplifier. If you dont have something that is supplying the RGB singals then it is of no use. The colors that you listed as red white and yellow are for COMPOSITE video with AUDIO. The yellow is the whole video signal and the red and white are stereo sound signals. No attempts at making that work will correct this unless you buy a converter.

RGB = Red, Green, Blue (Y, Pr, Pb) or the Component video inputs. Component is the highest resolution analog video input on your TV & unlike HDMI only carries the video information.

In order to connect your laptop to your TV using RGB, you need an RGB adapter. RGB is also known as component video; it breaks up a video signal into red, green and blue. laptops do not have RGB outputs. However, many laptops have VGA, DVI or HDMI outputs. An RGB adapter connects the single VGA, DVI, or HDMI cable to an RGB cable, which is actually three different cables tied together. INSTRUCTIONS:
1. Connect either the VGA, DVI or HDMI (in the order of increasing video quality) cable to the VGA, DVI or HDMI port on your laptop, depending on what is available. 2. Connect the other end of the cable to the side of the RGB adapter with the single input. 3. Connect the RGB cables to the red, green and blue ports on the other side of the RGB adapter. 4. Connect the other end of the RGB cables to an available component input on the back of the TV. 5. Tune the TV to the component video input you used through your television's menu. 6. Turn on your laptop. The laptop should now display on your TV screen.

There are more than two methods of hooking up the DVD player.
1) Get a 5pin component cable with Red, Green & Blue pins. Connect the DVD Player's RGB out pins to the TV's RGB in socket. This will take care of the picture. Then for sound you will need the second set of Red & White cable. Connect the Red & White pins to the DVD players audio out socket (Red for right channel and White for Left channel ). The other end of the cable you can connect to the Red & White socket next to the RGB socket where you have connected the Video. Play a DVD and scroll through the inputs slowly. You will see the picture appear on one of your selections.

Not really, first check your connections, normally when you loose red a pin broke off the VGA connector.

If the panel died then its probably not worth while. The red panel is however, under the most stress.

It maybe outputing RGB to a none RGB set. Try looking in the instaltion menu for RGB Output/Input on either dvd or set.

Well you need HD calbes there Blue Green and Red not Red yellow and white so put these in the yellow red and white and use them as RGB because it is a invalid format!!


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The sound is coming from the new toner cartridges. The roller is sticking and causing the gears to make that noise. I removed the toner cartridge and manually turned the roller until it turned smoothly. (this a little hard but it worked). no more noise!