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工控机主板不亮分析及解决方法

发布时间:2018-03-01来源:瑞迅科技浏览量:

一、机器无反应,电源灯不亮,不上电
  1.检查电源供电线是否正常
  2.检查主板上各个线头是否接插完好,像6pin线、电源20pin头等
  3.查看主板是否有料件烧
  4.如果主板上有电源指示灯看一下指示灯是否亮
  5.触发一下开关看看主板能否启动
  6.如果主板指示灯都不亮就把电源的绿线和黑线短接看看电源是否
  正常,最后更换电源测试主板是否正常

二、主板能通电但无内存自检声
  1.查看CPU供电线是否接插完好
  2.去掉南北桥散热片,用手触摸感觉是否一场热,包括电源芯片、I/O芯片、时钟芯片等
  3.主板所有外设都拔掉,包括板卡、VGA线、KB线、硬盘线、只留下主板必须的供电线,然后拔掉内存上电看看主板是否有报警音,像3680等就插一个蜂鸣器测试
  4.如拔掉内存无报警清一下bios看看主板是否有报警音
  5.去掉CPU散热片或者风扇,用手触摸CPU是否有温度
  6.重新插拔主板
  7.重新插拔CPU
  8.更换CPU
  9.用手轻压北桥、CPU、南桥
  
三、主板开机后显示器无反应,但有内存自检声
  1.检查显示器电源线和信号线是否接插正常
  2.检查主板显示芯片旁边是否有料脱落
  3.开机进bios,摁键盘上Num Lock灯是否正常亮和灭
  4.清bios
  5.用手触摸北桥,感觉是否异常热
  6.如果开机自检时有画面进到系统无显示,则查看主机是否切屏,用手摁住Ctrl+Alt+F1/F2/F3/F4,或者开机摁F8进安全模式或者VGA模式进系统查看主板是否显示正常
  
四、主机无法进系统
  1.开机进bios看看在bios下是否能找到硬盘
  2.查看硬盘线是否连接完好
  3.听硬盘转动是否正常
  4.用MHDD扫硬盘看看是否有坏道
  5.用diskgen重写主引导记录
  6.判断系统是否中病毒
  7.重新做系统
  8.更换硬盘后在重新做系统
  
五、主机开机花屏
  1.开机摁F8进安全模式,判断是不是驱动安装不对引起的
  2.用橡皮擦内存的金手指
  3.用砂纸清理内存槽,如果没有砂纸就多插拔几次内存测试
  4.更换内存
  5.如果更换内存主板还花屏就能判断可能是主板问题,更换主板测试
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