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故障1:主机加电后,彩显屏幕上布满不规则的字符,主机死机不自检。关机更换I/O卡插槽位置,并检查各连线均已插平,再开机故障依旧,依现象先更换VGA卡,故障排除。 维修分析:主机开机后,先对硬设备的配置及设备当前状况进行检测,其检测顺序大致分为: ①处理器测试 ②DMA、中断控制器测试 ③视频存储器测试 ④定时器测试 ⑤键盘测试 ⑥扩展I/O测试 ⑦RAM、ROM测试 ⑧磁盘连接测试 在前三部分测试中若出现故障,系统死机;后面四个测试如不成功,系统显示错误代码;最后一个磁盘连接测试出错,进入ROM BASIC。若测试通过,进入系统引导,由于故障为花屏、主机死机不自检,而且也知
Fault 1: After the host is powered on, the color display screen is full of irregular characters, the host crashes not self-test. Shut down to replace the I / O card slot position, and check the connection have been plugged in, and then turn on the fault still, according to the phenomenon to replace the VGA card, troubleshooting. Maintenance Analysis: The host boot, the first hardware device configuration and equipment to detect the current status of the test sequence can be divided into: ① processor test ② DMA, interrupt controller test ③ video memory test ④ timer test ⑤ keyboard test ⑥ extension I / O test ⑦ RAM, ROM test ⑧ Disk connection test If there is a fault in the first three parts test, the system crashes; if the last four tests are unsuccessful, the system displays an error code; the last disk connection test goes wrong and enters ROM BASIC. If the test passed, enter the system boot, because the fault is Huaping, the host crashes not self-test, but also know