西门子X300显示器底色间歇性变黄

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                    <p><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">故障现象：</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">&nbsp;&nbsp;&nbsp;&nbsp;西门子X300型</span>彩超<span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">正常使用过中，间歇性的出现显示器底色突然变黄，过几秒后又恢复正常。</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">&nbsp;</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">故障解决：</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">&nbsp;&nbsp;&nbsp;&nbsp;首先进入维修模式，对X300进行自检，结果显示一切正常。由于是间歇性故障，我们只能长时间开机观察。在一个多小时内，我们观察到了两次异常发生。在故障发生的同时，我们注意到，与彩超联接的工作站上的画面并未出现异常反应。由此初步判断机器主机正常，问题可能出在显示器上。</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">&nbsp;&nbsp;&nbsp;&nbsp;另外我们发现，在关闭X300后（机器下角电源开关不断开），显示器上出现“no input”字样，由此推测此机器的设计可能和电脑类似，显示器和主机各自有单独的电源供应。打开显示器后盖，我们看到由主机中引出的一根电缆线包括了DC12V电源输出口，VGA端口，数据排线接口等。我们用一块12v的直流电源适配器为显示器供电，并用VGA视频线将其与一台电脑主机相连接，即用它来代替普通液晶显示器。开机两小时，未见异常。因此大概可以判断，问题是出在VGA视频线或者是两端的接口上。</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">&nbsp;&nbsp;&nbsp;&nbsp;用万用表测量后发现，视频线一端由于弯折而产生了接触不良。咨询厂家，他们对整套电缆的报价是上万元，而我们通过观察断定，联接超声主机和显示器的视频线是独立的，因此我们用了一根三米长的VGA视频线代替后故障排除。</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">&nbsp;</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">故障原因分析：</span><br style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px; white-space: normal; background-color: rgb(247, 247, 247);"  /><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">&nbsp;&nbsp;&nbsp;&nbsp;我们通过观察发现，</span>X300<span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);">型超声显示器背后空间狭小，在左右转动时，视频线由于挤压拖拽而造成弯折。因此我们更换新线后用扎带固定，不使显示屏转动再对它造成影响。</span></p><p><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);"><br  /></span></p><p><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);"><br  /></span></p><p><span style="color: rgb(102, 102, 102); font-family: Simsun; font-size: 13px; line-height: 22px;  background-color: rgb(247, 247, 247);"><br  /></span></p><p><span style="color: rgb(102, 102, 102); 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