What are the disadvantages?
When plasma TVs came out initially, they had more issues than they have now. A couple of the issues discussed here (burn-in and low lifespan) are no longer major issues, and we note why this is so.
In older plasma televisions if the same image was on the screen for long, the image used to get “burned-in" onto the screen. However, with newer models, there is in-built technology to avoid this, such as pixel shifting.
The earliest batches of plasma TVs had a life of less than 30,000 hours, which was not comparable to say CRT TV sets. However, the technology has been improved such that they now have an expected life of more than 60,000 hours.
Plasma televisions are fragile units and need to be handled carefully because they can be easily damaged. They are also heavier than LCD TVs. They are therefore not suitable for the frequent mover.
They are currently not available at sizes smaller than 32 inches.
On average, plasma TVs consume more power than LCD TVs.
Since the brightness of a plasma TV screen is always less compared to LCDs, they are more susceptible to reflection glare, with the screen not being able to produce the desired amount of brightness. Please note that this is really an issue for daytime viewing, and in rooms that receive direct sunlight. If you can keep the sun out, you should be fine.
At high altitudes the high pressure of the gas can exceed the external atmospheric pressure, causing the screen to misbehave, as well as a buzzing noise to emanate from it. This is usually an issue at more than 6000 feet.
A plasma TV’s image is affected by radio waves, especially AM waves. This can be an issue if you are located close to a radio source – such as Ham radio or an AM radio station.
Unlike LCD screens, a plasma TV will generate heat.