| 故障现像：黑屏 检修与分析：检查背光24V供电0V,拔掉供电插座24V正常，检查背光板无明显短路，仔细检查排线终于发现24V的6根排线中有1根接地了，原来此排线是别人换过，型号不对。把此根接错线重新接好24V,机器正常。 |
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