As of 2010, Dell desktop computers come equipped with two video output ports: VGA and HDMI. The VGA, or video graphics array, port is an analogue video connection and does not carry any audio data. HDMI, on the other hand, is a digital video connection and sends both video and audio data. If you have a newer Dell Desktop and a high-definition RCA TV, you can use the HDMI cable to connect the two devices. However, if you own an older Dell desktop, you'll need to use a VGA cable.
Things you need
HDMI cable ORVGA3.5mm audio cable (For analogue connection only)
1 Connect the video cable to your Dell desktop computer. If you own a newer Dell desktop with an HDMI port, use the HDMI cable because it provides a better quality connection. If you own an older Dell desktop without an HDMI port, use the VGA cable. The video output ports are located on the back of Dell desktops.
2 Insert the other end of the video cable into your RCA TV's video input port. These ports are located on the back of RCA TVs. RCA TVs come equipped with a direct PC input. Therefore, if you are using a VGA cable, you can plug the VGA cable directly into the RCA TV.
3 Plug and audio cable that has a male 3.5mm plug on both ends into your Dell desktop computer's headphone jack. Then connect the opposite end into the 3.5mm audio input jack of the RCA TV located next to the VGA port. If you are connecting via HDMI, skip this step.
4 Change the input on your RCA TV to correspond with the video input port you've connected your computer to. Press the "Input" button on the RCA remote control to change the video input. HDMI inputs are labelled "HDMI 1," "HDMI 2," HDMI 3" or "HDMI 4." The VGA input is labelled "VGA."
5 Change the resolution settings on your Dell desktop. Click "Start," "Control Panel," "Appearance and Personalization" and "Adjust Screen Resolution." Click the "Resolution" drop-down menu and select the highest possible resolution.