The most common problem encountered when using USB devices is that its power source - power supply is easy to be insufficient; in order to effectively solve the problem of insufficient power of USB interface, this article specifically summarizes some countermeasures below, hoping to be useful to you!
How to identify insufficient USB power
Generally speaking, when a USB device is inserted into a system above Windows 2000, it can be automatically recognized by the system and can work normally; many USB devices with insufficient power often show the following failures after being inserted into the computer system:
1. The computer system can automatically recognize the USB device, and it is also normal when installing the driver of the device; but after installing the driver, it is found that the content in the device cannot be accessed, which is specifically manifested as the drive letter of the device cannot be found, the device cannot be used, etc.
2. The computer system cannot automatically recognize the USB device. The signal indicator light in the USB device is not on or the status is abnormal, and even the USB device will make unusual sounds. For example, if the hard disk with a USB interface is insufficient power, you will often hear the abnormal operation of the hard disk.
3. When the USB device is not connected to the USB device, the system can start normally, but once the USB device is connected to the USB device, the system cannot start normally, and error messages also appear, such as the system startup file cannot be found, or the system startup file is damaged, etc.
4. Even if the computer system can automatically recognize the USB device, and the contents in the USB device can be accessed, it is obvious that the access speed of the USB device is much slower than usual. Even when the USB device works for a long time, the device will suddenly experience access errors, or the computer system will crash for no reason.
Therefore, when you find that the above faults exist during the process of using a USB device, you must quickly check the source of its power to avoid taking more detours in the process of troubleshooting!
Once it is confirmed that the above fault is caused by insufficient power of the USB device, you might as well refer to the following methods to deal with it quickly:
1. External power supply method
With the continuous improvement of various technical indicators of USB devices, its working current is also "long-term". For example, some mobile hard drives with extremely fast speeds have sometimes reached the 1A standard, and such power has exceeded double the normal power. Therefore, it is no longer realistic to rely solely on the USB interface to provide enough power source for USB devices. To this end, when we use high-power USB devices, we must equip them with a separate external power supply to ensure the stability of the USB devices and computer systems.
2. Interface replacement method
Nowadays, many USB device manufacturers often provide several different connection interfaces for USB devices in order to give the USB devices they produce enough "place" to use. Once the USB device cannot obtain enough power source from the USB interface, they can also use other ports that consume less power to connect to it, thereby ensuring that the USB device can be used normally. For example, when the USB port of some mobile hard drives is connected to an old motherboard, it often does not work properly, but if you use another PS/2 port to connect to the computer, the mobile hard drive can work normally.
3. Power reduction method
Under normal circumstances, the power supply of each USB port in the motherboard is 0.5A. If the rated current of the USB device when it works normally exceeds this standard, the motherboard will not be able to accurately identify the USB device; at this time, the only feasible way is to choose a USB device that consumes low power, or a USB device powered by an independent power supply to ensure that the USB device works normally.
4. Exclude different methods
The so-called "exclusion method" means to remove other USB devices that are temporarily unused from the motherboard's USB port, leaving only USB devices that are urgently needed, so that the motherboard can provide a source of power for the USB device separately, thereby ensuring that the device can work normally. Considering that every two USB ports in the new motherboard are divided into a group, each with a separate power supply, when other USB devices are plugged into ports in the same group as the current USB device, the power energy obtained by the current USB device from the motherboard will be affected. So when you find that the current USB device is insufficient, be sure to pull out other temporarily unused USB devices, or plug it into another set of USB ports.
How to prevent insufficient USB power
In order to avoid insufficient power in USB devices as much as possible, we also need to do a good job of preventing in advance:
First of all, you need to use a high-configuration computer to connect to USB devices. Because high-configuration computers often have superior motherboard performance, the power current provided by the USB port is also higher than that of the old motherboard. In this way, the USB device will not easily cause insufficient power failure when plugged into the motherboard. Secondly, when choosing a USB device, you must go to a regular seller or agent to ensure that the USB device itself has stable performance and excellent quality.
How to identify insufficient USB power
Generally speaking, when a USB device is inserted into a system above Windows 2000, it can be automatically recognized by the system and can work normally; many USB devices with insufficient power often show the following failures after being inserted into the computer system:
1. The computer system can automatically recognize the USB device, and it is also normal when installing the driver of the device; but after installing the driver, it is found that the content in the device cannot be accessed, which is specifically manifested as the drive letter of the device cannot be found, the device cannot be used, etc.
2. The computer system cannot automatically recognize the USB device. The signal indicator light in the USB device is not on or the status is abnormal, and even the USB device will make unusual sounds. For example, if the hard disk with a USB interface is insufficient power, you will often hear the abnormal operation of the hard disk.
3. When the USB device is not connected to the USB device, the system can start normally, but once the USB device is connected to the USB device, the system cannot start normally, and error messages also appear, such as the system startup file cannot be found, or the system startup file is damaged, etc.
4. Even if the computer system can automatically recognize the USB device, and the contents in the USB device can be accessed, it is obvious that the access speed of the USB device is much slower than usual. Even when the USB device works for a long time, the device will suddenly experience access errors, or the computer system will crash for no reason.
Therefore, when you find that the above faults exist during the process of using a USB device, you must quickly check the source of its power to avoid taking more detours in the process of troubleshooting!
Once it is confirmed that the above fault is caused by insufficient power of the USB device, you might as well refer to the following methods to deal with it quickly:
1. External power supply method
With the continuous improvement of various technical indicators of USB devices, its working current is also "long-term". For example, some mobile hard drives with extremely fast speeds have sometimes reached the 1A standard, and such power has exceeded double the normal power. Therefore, it is no longer realistic to rely solely on the USB interface to provide enough power source for USB devices. To this end, when we use high-power USB devices, we must equip them with a separate external power supply to ensure the stability of the USB devices and computer systems.
2. Interface replacement method
Nowadays, many USB device manufacturers often provide several different connection interfaces for USB devices in order to give the USB devices they produce enough "place" to use. Once the USB device cannot obtain enough power source from the USB interface, they can also use other ports that consume less power to connect to it, thereby ensuring that the USB device can be used normally. For example, when the USB port of some mobile hard drives is connected to an old motherboard, it often does not work properly, but if you use another PS/2 port to connect to the computer, the mobile hard drive can work normally.
3. Power reduction method
Under normal circumstances, the power supply of each USB port in the motherboard is 0.5A. If the rated current of the USB device when it works normally exceeds this standard, the motherboard will not be able to accurately identify the USB device; at this time, the only feasible way is to choose a USB device that consumes low power, or a USB device powered by an independent power supply to ensure that the USB device works normally.
4. Exclude different methods
The so-called "exclusion method" means to remove other USB devices that are temporarily unused from the motherboard's USB port, leaving only USB devices that are urgently needed, so that the motherboard can provide a source of power for the USB device separately, thereby ensuring that the device can work normally. Considering that every two USB ports in the new motherboard are divided into a group, each with a separate power supply, when other USB devices are plugged into ports in the same group as the current USB device, the power energy obtained by the current USB device from the motherboard will be affected. So when you find that the current USB device is insufficient, be sure to pull out other temporarily unused USB devices, or plug it into another set of USB ports.
How to prevent insufficient USB power
In order to avoid insufficient power in USB devices as much as possible, we also need to do a good job of preventing in advance:
First of all, you need to use a high-configuration computer to connect to USB devices. Because high-configuration computers often have superior motherboard performance, the power current provided by the USB port is also higher than that of the old motherboard. In this way, the USB device will not easily cause insufficient power failure when plugged into the motherboard. Secondly, when choosing a USB device, you must go to a regular seller or agent to ensure that the USB device itself has stable performance and excellent quality.