The method of repairing the frequent failure of lcd television is to learn to judge which is the fault, which is the first step ... The main failure of lcd tv and the determination of its location are described below。
1. There was no sound or sound on the switch, a flash of the power light became regular, and the screen flashed white light in the flash, most of the failure was damage to the back light drive, although in maintenance it was also encountered damage to the lamp in the screen。
2. A back-to-back screen (marsake) appears on the engine. The sound is normal. The first of these is poor digital plates (facility or poor contact with ic) and the second is poor in-flight contact。
3. Turn-on three, power lights are not on, the first is power plate failure and the second is irregular work in the cpu sector。
Light flashes cannot be turned on, cpu bus is not working properly or the ic (bios) procedure is not good, and contact between "bios" ic and cpu is poor。
Let me say again about the machines i've been exposed to and the failures and the method of removal:
As stated above, screens are the most problematic (black belts, bright wires) and this is generally not possible without maintenance, but with technical and maintenance conditions。
The screens of the second, lg v6 v7 components are the usual bads, and the phenomenon is full-screened mixed points, and some of them are strewn with regular bars, which can replace a pair of buffers (or even a pair of bad ones). People don't sell you individually, or measure which ic is bad。
3. Either way, the y plate is the second most likely to be broken in the pdp machine, and it is usually damaged by the screen, full of colour spots, or power protection due to short circuits. The vs or va voltage is instantaneous, but does not reach the value on the screen. I don't know why。
Panels 4 and x are also the usual components of the pdp machine, expressed in the form of on-board protection (the fuzzy screen is high) and brightness。
The failure rate of the logical board is also low and is more common in the pdp ld, where the performance is mostly luminous, without characters, without images, or without rules, colours, negative images, etc。
6 the frequent failure of the lcd is a problem on the screen, with dark bands, lines, which are the most common, which can be summarized in the screen, some with maintenance conditions to repair, and some because of high temperatures, leading to the separation of the cof and the acf of the screen connection points. This can be repaired by burning thermal insulation media under a flat iron。
7 in the lcd machine, the reverse circuit (high pressure plate) of the screen component is a faulty multiple, manifested in light on the starter, but no light at any moment, except for sound (sharp), except that the aging and damage of the pv leads to the protection of the high pressure plate, and the method of judging whether the pv or the high pressure plate itself is to remove the mean on the high pressure plate from the more feedback circuit。
8, many of the friends asked how sharp's lcds would be repaired, which is similar to the normal lcds, and when you enter the maintenance menu, you can see that there are fault codes there, some simply emptied the code, and some of the corresponding fault points。
