Start more: cope with insufficient USB Power Supply

The most common problem encountered when using a USB device is the power source-the power supply is insufficient. to effectively solve the fault of insufficient power of the USB interface, this article specifically summarizes some countermeasures, I hope it will be useful to you!

How to identify USB Power Insufficiency

Generally, when a USB device is inserted into a Windows 2000 or later system, it can be automatically recognized by the system and work properly. After many USB devices with insufficient power are inserted into the computer system, the following failures often occur:

1. The computer system can automatically identify the USB device and install the driver of the device.ProgramHowever, after the driver is installed, you cannot access the content of the device. This is because the drive letter of the device cannot be found or the device cannot be used.

2. The computer system cannot automatically identify the USB device. The signal indicator in the USB device is not on or is abnormal, and even the USB device emits unusual sound, for example, if the hard drive of the USB interface is not powered enough, the hard drive will often be "choppy.

3. When a USB device is not connected, the system can be started normally. However, after a USB device is connected, the system cannot be started normally and an error message is displayed, for example, the system startup file cannot be found, or the System Startup File is damaged.

4. Even if the computer system can automatically identify the USB device, and the content of the USB device can be accessed, it is obvious that the access speed of the USB device is much slower than usual, even when a USB device is working for a long time, an access error occurs suddenly, or the computer system crashes for no reason.

Therefore, when you find that the above fault exists when using a USB device, you must check its power source to avoid detours during troubleshooting!

Once it is confirmed that the fault is caused by insufficient power of the USB device, you can refer to the following methods for quick response:

1. External Power Supply Method

With the continuous improvement of various technical specifications of USB devices, its operating current is also "continuous expansion". For example, the operating current of some mobile hard disks with particularly high speed has sometimes reached the 1a Standard, this is already more than double the normal power, so it is not very realistic to rely solely on the USB interface to provide sufficient power to the USB device. Therefore, when using a high-power USB device, we must provide it with a separate external power supply to ensure the stability of the USB device and computer system.

2. Interface replacement

Many USB equipment manufacturers usually provide several different connection interfaces for USB devices to make their USB devices available for use, once the USB device cannot obtain enough power from the USB interface, you can also use other ports that consume less power to connect to ensure that the USB device can be used normally. For example, some USB interfaces of a mobile hard disk may not work normally when connected to the old-style motherboard. However, if you use another PS/2 interface to connect to the computer, the mobile hard disk will work normally.

3. Power Reduction Method

Under normal circumstances, the power supply for each USB port in the motherboard is 0.5a. If the rated current of the USB device exceeds this standard during normal operation, the motherboard will not be able to accurately identify the USB device; in this case, the only feasible method is to select a USB device with low power consumption or a USB device with independent power supply to ensure the normal operation of the USB device.

4. Exclusive Methods

The so-called "exclusion method" means to remove other USB devices temporarily unavailable from the USB port of the motherboard, leaving only the USB devices that urgently need to work, in this way, the motherboard can provide power sources for the USB device separately to ensure that the device works properly. Considering that each of the two USB ports in the new motherboard is divided into one group, each group uses a separate power supply, so when other USB devices are plugged into a port in the same group as the current USB device, the current power of the USB device from the motherboard will be affected. Therefore, when you find that the power of the current USB device is insufficient, you must pull out other USB devices temporarily unavailable, or insert it into another set of USB ports.

How to Prevent USB Power Insufficiency

In order to avoid power shortage of USB devices as much as possible, we also need to do a good job of prevention in advance:

First, you need to use a high-configuration computer to connect to the USB device. Because of the high-configuration computer, the motherboard performance is usually superior, therefore, the power current provided by the USB port is higher than that provided by the old motherboard, so that the USB device is not prone to power failure when it is inserted into the motherboard. When selecting USB devices, you must purchase them from a regular seller or agent to ensure the stability and quality of the USB devices.