USB interface contact failure often manifests as intermittent charging, interrupted data transmission, or delayed device recognition. The root causes are typically linked to oxidation of the metal contacts, accumulation of foreign matter, or wear from repeated plugging and unplugging.

When abnormalities are detected, it is recommended to first use a strong flashlight to inspect the port for dust, fibers, or Other debris. Initial cleaning can be performed with precision tweezers and a 75% medical alcohol swab. For stubborn oxidation, apply a specialized electronic contact rejuvenator spray and let it sit for 3 minutes, then gently wipe the contacts repeatedly in their direction using an ultra-fine microfiber cloth.

If the issue persists, use a multimeter to measure the contact resistance of the interface. Under normal conditions, it should be below 50 mΩ; if it exceeds 200 mΩ, worn contact plating or deformation of spring terminals should be suspected.

During the repair process, avoid using hard metal tools to scrape the contacts, as this can worsen contact issues by stripping the plating. For interfaces with physical deformation, it is advisable to replace the entire socket module rather than forcibly realigning the metal springs, which could cause further damage.