Medical equipment reservation maintenance usb

When the light is on, it is 1, which makes good contact with pin 4. It was 1 when it was closed, and it was in poor contact with pin 4. If it fails, it may be that the contact between the two feet and the three feet is poor. 1, 4 is responsible for power supply, and 2 and 3 are positive and negative data channels.

Due to the frequent use of USB interface, the contact gap is too large and loose.

1: You can pinch the USB plug along the part indicated by the green arrow. This can be done. I often do this.

2. Insert 2 or 3 needles into the USB socket of the computer with a medical alcohol (75% concentration) cotton swab to drive away dust.

3. Note that you need to ensure that the third pin (grounding) of your power cord is truly grounded, so as to eliminate the static electricity of your computer, because static electricity will also cause the use failure of USB devices. In many cases, the grounding pin is just a decoration, and it is not really grounded.