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On average, you can expect to pay the following amounts to have you television repaired: â¢ LCD Small: Â£45 â Â£70. â¢ LCD Medium: Â£50 â Â£80. â¢ LCD Large: Â£55 â Â£100. â¢ Plasma TV: Â£70 â Â£140. The cost of repair could depend on what needs to be replaced in your TV unit. For example, replacing a backlight is quite feasible and could cost you Â£50.
A backlight is a form of illumination used in liquid crystal displays (LCDs). As LCDs do not produce light themselves (unlike for example Cathode ray tube (CRT) displays), they need illumination (ambient light or a special light source) to produce a visible image.Backlights illuminate the LCD from the side or back of the display panel, unlike frontlights, which are placed in front of the LCD.acklights are used in small displays to increase readability in low light conditions such as in wristwatches, and are used in computer displays and LCD televisions to produce light in a manner similar to a CRT display.