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1.PC 主板及 CPU 故障维修技巧熟悉 PC 主板的总线类型及 I/O 总线插槽中各信号排列情况,以 I/O 插槽中重要信号为线索进行故障点查找是维修 PC 主板致命性故障的关键。微机主板常用总线有:PC/XT、PC/AT、VESA、PCI 等类型,不同总线的 I/O 槽中信号排列有所差别,熟悉I/O 槽中重要信号是查找因总线类故障系统死机、屏幕无显示等严重故障的前提。对死机类故障,首先区分故障原因是由 I/O 设备故障引起还是主板本身故障引起。确诊故障在系统板后,可检测系统板 I/O 槽中地址总线或数据总线的脉冲状态,初步判断系统故障部位:若所有地址总线或数据总线均无脉冲,则可能是 CPU 未工作;若个别地址总线或数据总线为恒定电
1.PC motherboard and CPU fault repair skills Familiar with the PC motherboard bus type and I / O bus slot in the signal arrangement, the I / O slot in the important signal for the clues to find fault point is to repair the PC motherboard fatal failure key. Commonly used computer motherboard bus: PC / XT, PC / AT, VESA, PCI and other types of different bus I / O slot signal arrangement is different, familiar with the I / O slot important signal is to find fault due to bus system crashes , The screen no display and other serious problems on the premise. Crash class failure, first of all distinguish the cause of the malfunction caused by the I / O device failure or the motherboard itself caused the fault. After the diagnosis of the fault in the system board, the system board I / O slot can detect the address bus or data bus pulse state, the initial judge system failure parts: If all the address bus or data bus without pulse, it may be CPU is not working; if Individual address bus or data bus is constant