If the red light of the wired mouse flashes, it may be due to the following reasons:
1. The mouse surface has too much dust or dirt, which needs to be cleaned;
2. The optical sensor at the bottom of the mouse is damaged or faulty and needs to be replaced or repaired;
3. The mouse cable is improperly connected and needs to be reinserted or replaced. The solution can be to clean the surface of the mouse first, if the problem still exists, you can check whether the optical sensor at the bottom of the mouse is damaged and needs to be repaired or replaced. At the same time, also make sure that the mouse cable is well connected to avoid poor connection.