LCD monitors most easily damaged parts: inverter, data cable, driver board, built-in power supply and the screen itself, the following analysis of these types of situations:
A) The more the fault of liquid crystal display inverter. the inverter problems after the malfunction phenomenon generally divided into two kinds.
1) lamp to light it, and soon is not bright;
2) Lamp does not light up. For these two faults can repair the G60-235DX Screen Inverter or direct replacement of the inverter. Maintenance should pay attention to the part of the display the lamp lines open, the lamp is broken or aging will appear to light soon, it will not work.
2) VGA cable is bad, resulting in the wrong color or the machine does not work, replace the VGA cable directly. Replace the line before the original line of clear measurement, so that the rapid replacement of the line wrong pin.
C) bad driver board, are generally not boot or boot is not working properly. Bad driver board, roughly divided into the main chip is bad, MCU bad or data loss, the power supply circuit is broken, and so on. General driver board is broken, repair is too much trouble, easy to find parts and data software, general power supply circuit can trim MCU damaged or loss of data some models can rewrite the software data to solve, but still not many displays write (Software not find), how to do? In this case, generally available substitute plate or a universal plate.
4) built-in power supply is bad, mainly with output voltage or output voltage can not afford to load. Power bad good repair, and generally check the output there is no voltage output. Any AC circuit basically no problem, is to investigate the DC circuit. Protection circuit problems, the filter circuit open circuit or capacitor failure, rectifier diode is broken, and so on. The output section voltage output, check the post-load short-circuit. Short circuit disconnect short circuit, voltage is not normal. If the post-stage circuit is not short circuit, it would have to check the exchange part from AC 220V to bridge heap, filtered by the rectifier 300V DC 300V to post-stage switch tube circuit to power management IC, one by one investigation.
E) the screen is broken, generally the following situations:
1) the Huaping vertical color bars or COG, TAB bad;
2) white or black screen;
3) bright line, bright band, dark lines, black lines, dark spots;
4) backlit paper, backlit panels adverse polarizing film scratches.
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