Can We Use a CRT Television or a Regular Flat Screen TV as a Computer Monitor?

The age-old question of whether an old CRT or flat screen TV can serve as a computer monitor has puzzled many tech enthusiasts and casual users alike. With advances in technology, there are solutions to connect these outdated screens to modern computers, although certain limitations and considerations must be taken into account.

Adapting CRT TVs

For those who have a desire to use their CRT television as a computer monitor, there are adapters and devices that can convert a VGA output from the computer into an RGB signal suitable for TV use. However, expect a lower resolution and potential compatibility issues. Here’s a step-by-step guide on how to do it:

Step 1: Identify Your Computer Output. Most modern computers have HDMI, but VGA is an older standard used in some systems. Step 2: Purchase a VGA to RGB Adapter. These adapters can convert the signal to RGB, which most older TV displays use. Step 3: Connect the Adapter to Your Computer. Plug the VGA cable from the adapter into the computer’s VGA port, and connect the RGB cable to your CRT TV.

Keep in mind that while this method works, you might experience lower resolution and visual effects compared to using a traditional monitor. The process can be somewhat less than ideal but is still a viable workaround for older systems.

Adapting Flat Screen TVs

For those in search of a cheap or renewable solution, there are numerous flat screen monitors available in thrift stores. For instance, I recently purchased a 4-year-old screen for just 8 USD, and it works perfectly well. Even more surprisingly, I've found functioning monitors just lying on the curb on trash day, which speaks to the limited supply available at thrift stores.

When selecting a flat screen, ensure it has a suitable connection for computer input. Early models often feature a blue VGA or a white DVI port with a stereo banana audio jack. For modern displays with HDMI inputs, a simple converter can make the connection possible. If you're working with DisplayPort, you may face some challenges, but these can be overcome with the right connectors.

The Bottom Line

While it is indeed possible to use a CRT or flat screen TV as a computer monitor, the practicality of this solution depends on the age and specifications of your TV, as well as the computer’s video output. For modern computers, it is hardly worth the investment due to potential limitations and the availability of newer, more versatile monitors.

If you’re thinking about using a vintage Apple 2 or other older character-based display computers, it might work, but you will need a composite video graphics card, and the TV’s bandwidth and CRT dot pitch may not be sufficient for a traditional computer monitoring experience. For a kiosk environment with large text and coarse graphics, a CRT or flat screen TV might suffice, but for general computing tasks, it is best to stick with modern monitors or use a dedicated kiosk setup.

Ultimately, the decision to use an old TV as a monitor should weigh the cost against the benefits, as well as the compatibility and performance you need for your computing tasks.