From the fault structure above, the metal conductor (PIN PIN/terminal) inside the connector is the core part of the whole, which is used to transmit data signal or current of the external connection wire or cable to the connector contact. Therefore, the connector design must be required to achieve excellent structure, to have very reliable stability and good electrical conductivity.

Because this is so common, it can happen for a number of reasons:

1, may be due to the connector contact parts design is not reasonable

2, the material choice is not in place, metal material or plastic material performance is not stable

3. poor quality, unreasonable tolerance value of product to insert size, resulting in poor contact.

4, metal surface coating off or oxidation and other reasons.

So, in the electronic device failure when the first problem to consider is the contact problem, be sure to check all the joints, the case of a tight connection to consider other problems. One of the issues that needs to be addressed is the protection of the connector during use, which is also important. Sometimes the bad contact is because we usually protect the improper, resulting in local damage or corrosion of the connector, the bad contact caused by this situation is generally difficult to repair, the connector needs to be replaced, not only is the trouble, or the waste of resources and economic loss. Different connector working environment and temperature is not the same, only reasonable use performance can be more stable.