TRYING TO INPUT LAPTOP TO RGB IN,AUDIO WORKS BUT VISUALY "NO SIGNAL"

The projector has a RGB input
So to use it on a VGA output from the computer you would need a VGA to RGB adapter
or something like this adapter
https://www.auselectronicsdirect.com.au/hdmi-to-vga-and-rgb-component-converter
with a component cable
as projector has component inputs also

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.

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.

Check the tuner i/o board connector there might be a loose connection from the soccket.

I/O board means input output board, this is where the antenna and audio video input are pack in.It is just inserted at the socket..check whethere the connectors are lock properly

More info is needed, please. When you say 3 video inputs, what are you referring to? I believe the Sanyo has the HDMI, RGB/YPbPr component video, S-video component, RCA composite video and Coaxial connections, though I'm not sure how many of each. So lets start with the best quality to least.

HDMI: This is one cable that provides both audio & video and produces the best picture quality. It comes in different lengths and is a wide, flat connection. A must for 1080p resolution signals.

Component video, RGB or YPbPr analog component cables: 5 separate RCA cables, 3 of which are video that separate the video signal & 2 audio cables. The 3 video cables are generally red, green and blue (RGB) or marked individually with the letters Y, Pb/Cb & Pr/Cr . The audio cables are red & white. You may see these on the back of DVD players often. They will carry a signal up to 1080i but not 1080p.

S-video component: One cable for video, it is a round connection with several pins in it and will only plug in one way. You must use 2 RCA cables for audio with this cable, red & white again.

Composite video: 3 separate cables; Red, White & Yellow. Red & White are audio, left and right while yellow is video.

And finally there is coaxial which it the cable that is identical to the cable from the pole/ cable box or your dish. It is the poorest quality.

What can happen is you are using 3 standard RCA cables and have them plugged into the component input & they will not carry the signal, or one end in component input and the other end in the composite output or vice versa. Another is that you have the wrong input selected on the menu. Check all your cables and connections, plus the input you have selected on the TV itself.

Couple of items come to mind.
In the menu of the receiver, is there a way to choose video and RGB?
Set the receiver to SAT
Connect the HD Cable Box to SAT
Check the TV is on Monitor RGB.
Check the input being used by the monitor RGB cables is selected on the TV.
Have a picture? NO, receiver has issues.
Yes? Do this with each input to confirm they work.
You can reset the whole receiver to factory by holding the tone button down and holding the standby button for three seconds. (This clears your speaker setups, too.)

change it to VGA and put the audio in the mic jack on the laptop and in the audio in jack on the tv.

You need to change the input signal, get into the menu on your monitor and change the signal from rgb to dvi, hdmi or vga dipending on what cable you using for connection.
There is NO rgb connector on that monitor

Good luck

Same problem!!! Inspiron E1505 connected to a year old LG 47" 1080p lcd. My rgb used to work fine, plug and play with my pc. No luck with my laptop though. I've tried setting up duel monitors, updating all(atleast I think all) of my drivers, and rechecking all connections!! Please Help.

Cable TV: Connect the LCD TV to the cable with CATV and Digital cable. Preset the cable TV channels into memory with Auto Scan function when using a cable TV system. Make sure you set the INPUT SOURCE properly (TV, VGA, S-Video, etc)