How to find faulty accessories

Minimum system method

1. Hardware minimum system: consists of power supply, motherboard, CPU, memory, graphics card and display. The whole system can judge whether these core parts can work normally through the motherboard alarm sound and the power-on self-test information.

2. Run software minimum system: This minimum system is mainly used to judge whether the system can complete normal startup and operation.

Replacement Method

1. Consider the parts or equipment that need to be replaced according to the phenomenon of the fault;

2. Replace in the order of difficulty of replacing parts. Such as: first memory, CPU, rear motherboard.

3. The first to test the connection line, signal line, etc. connected to the suspected faulty component, then replace the suspected faulty component, then replace the power supply component, and finally the other components related to it.

4. Based on experience, consider the first replacement component from the failure rate of the component. Parts with high failure rates are replaced first.

Diagnostic Card Method

The Diagnostic Card Method is a method for checking the system with a dedicated diagnostic card. The diagnostic card is similar to the graphics card or sound card we usually see. It has a PCI interface and an ISA interface. There are usually some indicators on the card to show how the various components of the computer work. Usually in use, we can easily identify faulty parts according to the card's instructions according to the status of the indicator on the card. Before the maintenance, we usually take dust removal operations on computers with more dust.