Here's the breakdown:

* Voltage: 120V TVs are designed to operate on a voltage range. Most likely, they can handle a slight variation, including 220-240V with the right adapter.

* Frequency: 50Hz is significantly different from 60Hz. This difference can cause issues:

* Flickering: The refresh rate of the TV is tied to the frequency. A 50Hz power supply might lead to noticeable flickering, especially on fast-moving images.

* Damage: In some cases, the difference in frequency can strain the TV's components and potentially damage them.

* Performance: Some TVs might have features like smooth motion that are optimized for 60Hz. These might not work as intended on a 50Hz power supply.

What to do:

1. Check your TV's manual: It might contain information about its power supply compatibility.

2. Look for a label: Many TVs have a label indicating their voltage and frequency requirements.

3. Use a converter: A voltage converter will convert the voltage from 220-240V to 120V. However, it won't address the frequency issue.

4. Consider a new TV: If you plan to live in a 50Hz area, a new TV specifically designed for that region is the best solution.

In general, it's not recommended to run a 120V 60Hz TV on a 50Hz power supply. The risk of flickering, damage, and subpar performance is high.