The best way to know if you got a quality HDTV product is by testing it in front of the salesperson before buying it.
But if certain problems and issues about your HDTV starts to materialize in the future, don't freak out and I'm not saying that you should just relax, but some problems can be fixed and all you need, is a little know how.
Wireless devices that are connected to your HDTV takes a little bit more time for the screen to catch up and process the image or this is better known as 'Lag'. Using your gaming console can contribute to lagging. Lag is very important when it comes to gaming consoles. You can press the 'Menu' button and then press the 'Game Mode' to correct this problem. Try playing again and see if there is any changes in the lag.
A damaged HDTV has many picture quality setbacks. And these are the following problems:
Mosquito - This is when the picture is filled with dots or noise. Don't worry, there is nothing wrong with your HDTV set. The broadcasting is the problem. The way to repair this is by buying an outboard digital noise processor, such as an Algolith Mosquito HDMI. But this will cost you a lot.
Unnatural Colors - The tones and shades of colors in the picture is unrealistic. You can mend this by clicking the 'Movie' or 'Natural' mode in your HDTV menu. Don't forget to adjust the color, contrast and brightness option for better picture quality.
Pixilated Picture - This happens if there are visible horizontal stripes that are continuously going up in your HDTV screen. This is because there is low digital signal that is coming in to your HDTV. Ask your cable provider to fix this problem or you can buy an inline amplifier/preamplifier to boost the signal strength.
There are also these types of picture distortion that is considered to be worse than those I've listed above. So, if your HDTV has these problems; Crawling Moss, Burnt Edges, etc. where the pictures are unrecognizable. Or the edges of the objects in the picture tend to burst into bright colors. These cases are severe and you need to return your HDTV to the manufacturer and get your money back or let them fix this.
All LCD HDTV has backlighting, either led or cold cathode backlighting. Backlight can alter the image in your HDTV. Therefore to correct this problem, go and click the 'Menu' option, then 'Picture' then 'Backlight' and adjust it from there until you get the desired brightness.
Immediately return your HDTV to the manufacturer if it has problem in its power supply. That is if you had just recently bought your HDTV, but if not and your HDTV is out of warranty, try to fix this problem first before asking for professional help. But if your HDTV is quite old and is already out of warranty, you can actually fix this problem and will save you a lot of money. Here's how;
First; open the casing, this might be intimidating at first, but taking your TV apart is fairly easy to do. Just don't forget to remember where the screws go, so you can put it back after you're done.
Second; If the problem in your HDTV is the power supply, the capacitor or capacitors are surely the ones that are not functioning well. Find the capacitors, they are usually 'blue' in color and are located at the right side.
Third; spot the bulging capacitor or capacitors and take that out with a soldering iron. Change it with a new, and it must be the same of a kind capacitor that you have taken out. Use a soldering iron to perform this task. And your HDTV would be as good as it was.
Having a professional mechanic to fix your damage HDTV can be very expensive and time consuming. And some problems are not that difficult to solve; all you need is well researched information to help you troubleshoot these problems.