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故障现象:一台诠脑486DX2/50电脑在进行WPS文字编缉过程中,屏幕突然变得无任何显示。重新启动电脑,显示器电源指示灯亮,同时可听到主机的自检声,但屏幕无任何显示,旋转显示器的所有调节钮故障依旧。 分析与检修 根据上述故障现象可初步确定故障范围有以下3个方面:1.显示器本身故障;2.连接主机与显示器的信号线故障;3.彩卡出现故障。为了更进一步缩小故障范围,首先将彩色显示器从主机上拆下,将其接入另一台计算机,结果显示正常,于是1、2两种可能故障立即被排除,此故障显然出在彩卡上。小心打开主机箱,卸下彩卡,可以看到此机的显示器是靠一块TVGA9000C彩卡来驱动
Symptom: A Quan interpretation 486DX2 / 50 computer WPS text editing process, the screen suddenly becomes without any display. Restart the computer, the monitor power indicator light, at the same time can hear the host’s self-test sound, but the screen without any display, rotate the monitor all the control button failure still. Analysis and Overhaul According to the above symptoms can be initially identified the scope of the fault has the following three aspects: 1. The display itself is faulty; 2. Connect the host and display signal line failure; 3. Color card failure. In order to further narrow the scope of the fault, first remove the color monitor from the host computer and connect it to another computer. The result shows normal. Therefore, the two possible faults 1 and 2 are immediately eliminated and the fault is obviously on the color card . Carefully open the main chassis, remove the color card, you can see this machine’s display is driven by a TVGA9000C color card