Mitsubishi Electric company from Japan is well-known the world over for large-screen display panels and industrial-strength LCD monitors. Some of the popular models in use today include the Mitsubishi LDT461V industrial monitor along with the MDT461S and MDT402S LCD monitors.
You may notice that all of these monitors are pretty big in size, ranging from 40-46". To make a comparison, they are similar to the sizes common among plasma televisions, but the technology that powers them is pure LCD.
And like any other LCD monitor manufactured in past two decades, there are two problems that affect even the Mitsubishi monitor -- (1) Scratched screen, and (2) Dead backlight.
Since Mitsubishi LCDs are used as industrial-grade displays, the front panel is pretty strong and resistant to scratching. But there's a manufacturing difference between screens used in an industrial setup and one installed in homes. In the latter case, chances of minor yet visible scratches across the screen are pretty high. So the quick fix is to either use a little toothpaste to "fill in" the scratch gaps, or to use a white eraser and vigorously (but gently) rub over the visible scratches. If you're using an eraser, make sure it is a brand new one that has never been used before. I've tried this scratch repair trick on certain projection TVs and it works fine there. The second problem is that of backlight repair. The backlight is a thin CCFL tube that lights up the monitor screen. It is powered by an inverter board that converts low-voltage DC input to high-voltage AC output. A regular backlight bulb lasts anywhere from 3-5 years before it loses part of its brightness. As time progresses, the whole screen goes black and you have no option but to replace the backlight. Backlight failure is a problem that affects all LCD monitors -- including Mitsubishi -- though the lifespan will vary based on how you operate it and the quality of in-built electronic components. The easiest way to repair a LCD backlight is to get a compatible replacement from Ebay or the manufacturer's website. For the most part, you don't need to buy a new inverter as the existing one can be reused.
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