usually, the cause of the surge on the hub port is caused by the weak USB power supply. Why is there a surge on the hub port? How can this phenomenon be solved?
The steps are as follows:
One, the power surges on the hub. This is due to the lack of USB power supply, but what is the best way to solve it? Turn on System Properties-hardware-Device management-Universal Serial Bus Controller, in the following list of the previous several relatively long items right-click, click Properties, under the Advanced tab, check on the last line "do not notify me of USB error (D)" Before the box is a tick, such as no tick, hit on it! There will be no more "power surges on hub ports" this annoying news!
Second, when the mobile hard disk plug into the USB interface, out of a "hub port on the surge" message box, said "a USB device exceeds its hub port power limit." The solution to this problem is as follows: This is a power supply problem, and USB devices can consume a maximum of 500 MA (MA) current for each connection. If a device tries to consume more current than this, the operation specification will invoke the appropriate function to disable the specific port until the system power is turned off and then turned on (this is called a "suspend" port).
1. If you have the conditions to add an external power to the USB device is OK. can use the active USB hub, this price is not very expensive, about 100 pieces.
2. Two connectors are connected: General Mobile hard drive USB Cable side has a connector, the other side has two, put one end of the plug in your hub, the other two at the end of the whole plug in the computer USB interface, this can solve the power shortage. Put the two USB plugs on the mobile hard drive, which may be a lack of power to the mobile hard drive! This is actually from the keyboard mouth that is PS/2 mouth (USB cable with a PS/2 port).
3. Short circuit: Generally the chassis front USB interface has a short circuit (line or interface may be, before and after the interface may have conductive foreign bodies), the front of the mouth from the motherboard to take a look at the good did not. or USB interface is plugged in, the internal data line short, the USB port is separated from the line, if it is a chassis USB, the main version of the line is not connected on the line
4. Try not to use the hub of the hard drive: USB front port is easy to power supply (except for the hub with power). Plug in the USB port behind the chassis as much as possible. If you use a USB hub, the shunt, the current is not enough to drive the USB device. If your mobile hard drive is 2.0. Using hubs can affect speed more.
5. Dust remover: For all USB ports, rear, front, and motherboard pins, including all connectors.
Third, failure phenomenon: Sometimes the lower right corner of the computer will appear on the hub port surge warning. Sometimes the mobile hard drive makes a click, the LED is suddenly out and out, the computer can not find the phenomenon of the device.
1, on the hub port surge warning: In the Device Manager-"Universal Serial Bus Controller"-"USB Root Hub"-"power" can be seen in the use of the USB device power. Because of frequent plug-and-pull USB devices, or when the USB device transmits data to pull it out, it is easy to cause the USB interface instantaneous current too large, so that the error. It is not a problem to safely uninstall the USB device at ordinary times.
2, verify that the USB driver is installed correctly.
3, usb-if specified USB port power supply is 5v/500ma, but at present a lot of peripherals need more power than this standard. In particular, external hard disk cartridges or mobile hard drives and other devices, the use of this situation is easy to occur. Sometimes using a USB director line, or using multiple USB devices at the same time, may also cause insufficient USB power.
For the mobile hard drive clicks: USB device demand for more than 500mA, click on the USB icon and then select "Reset", USB devices may be correctly identified and used, if still can not be used. USB devices can be connected to a dedicated transformer, the use of computer PS/2 port and USB port to enhance power supply, replace the USB hard drive box or switch to a low speed hard drive, the use of dual USB plug power supply USB hard disk box; Do not use USB extension cable USB devices should be plugged into the rear of the machine USB interface to avoid signal decay; Do not use multiple USB devices at the same time, can generally solve the problem. You can also solve this problem by installing an active USB hub.
Power surges on hub ports: a power limit for a USB device exceeding its hub port is insufficient power. At first, you can see the hard drive by the reset, but after about 2 seconds there will be a surge of prompts, and then actually reset immediately after the prompt. I did not expect this problem to be so difficult. To address this issue, I have collected the following key points on the Web:
1, motherboard power supply is insufficient
2, the internal components of the hard disk damage
3, computer USB interface damage
4, motherboard driver or hard drive problem
5, power problems (mainly desktop)
6, South Bridge damage
V. First, if there is a problem, you can use the following method to test whether the hardware is faulty
1, in the BIOS and Device Manager to see if the USB port is disabled, make sure the USB port is available
2, plug your other USB devices into your computer to see, if all of the USB port can be a normal power supply, indicating that the USB port on your computer is basically no problem, there may be a short circuit problem, the general is the chassis front USB interface has a short circuit (line or interface is possible, before and after the interface may have conductive debris), Remove the front port from the motherboard to see if the state is good, it may be the USB interface is broken, the internal data line short, the USB port two lines apart, if the chassis USB, the motherboard on the line unplugged.
3, generally, the small hard drive in the mobile hard disk is better than 40GB after the best use of three USB plug connector, one of the longest connected plug to move the hard drive, the remaining two plug into the USB jack, using two USB sockets one as power supply and signal access, the other only for power supply. If you have already used this triple plug connection or lack of power supply, then we continue with the following steps
4, remove the mobile hard disk box in the small hard drive, only the mobile hard disk box plugged into the mainframe USB socket, if there is no response, it is the mobile hard disk box is bad, if you can find hardware and installed after the available, it is the mobile hard disk power supply is insufficient.
5,. Add an external power supply to your USB device if you have a condition
6, to move the hard disk as far as possible do not use a hub: USB front port easy to power supply (except for the hub with power supply). Plug in the USB port behind the chassis as much as possible. If you use a USB hub, the shunt, the current is not enough to drive the USB device. If your mobile hard drive is 2.0. Using hubs can affect speed more.
7. Dust Remover: For all USB ports, rear, front, and motherboard pins, including all connectors.
8, on the method does not work: Please check the driver of the mobile hard drive, in Safe mode uninstall the drive drive, reinstall the new driver provided by the manufacturer. I haven't tried this question.
The possible cause of this behavior is that the driver of a device is not properly installed. If this fault is first discovered, you can reboot the computer and view it again, or go into safe mode to double-check the device. If you have seen such a hint many times, this may indicate that there is a problem with the hardware of the device you are installing, please contact the merchant.
9, replace the 2.0 USB drive with 1.1 to solve the problem (the transient overvoltage caused by the externally powered USB device)
10, all of the above methods are still not good, basic can be judged as a mobile hard drive internal failure. The desktop may also have power problems, in short, hardware, in general, can only be sent to repair.
The concrete principle is as follows: The motherboard power supply is insufficient, appears as follows: "The power surge on the hub port: a USB device exceeds its hub port power limit". You can plug in the interface again, or uninstall the USB device in the Device Manager or the exclamation mark, and then automatically search for device installation. Or try reloading another version of XP
The reason of the power supply problem and the solution method. Generally speaking, USB interface hard disk box power problem arises from four reasons:
① usually power supply is not related to the box, but the motherboard USB port power supply capacity is not strong. Power shortages are particularly noticeable on some laptops, as laptops have more stringent limits on the motherboard ports than on desktop computers. Although the usb-if that the USB port provides a power supply is 5v/500ma, but at present many peripherals need to power more than this standard. In view of this situation, a considerable number of notebook manufacturers exceed the USB-IF standard, improve the USB port power supply, to adapt to high energy consumption peripherals. But there are a number of models in strict accordance with the USB-IF standard design USB port power supply, when such models and mobile hard disk close contact, there will be an embarrassing scene-power shortage, because most of the 20G more than the hard disk consumption of 700mA (such as the debut of Samsung 2.5-inch hard disk) or 1000mA (such as Hitachi 2.5-inch hard drive).
② hard drives are too energy efficient. As mentioned earlier, the current mainstream hard disk power consumption is mostly greater than 500mA, only has been obsolete 20G below the small hard disk power consumption is 500mA. Strictly speaking, there is little point in talking about this, which can be ignored basically.
③ Hard disk box circuit design unreasonable, or the use of high-energy chips and other accessories-often chip performance and energy consumption in direct proportion. This can lead to less symptoms of power supply.
④usb connector is too long or uses too many USB devices at the same time. Because the USB cable plays the dual role of data transmission and power supply, the connection too long will cause the resistance to increase and data interference to generate power shortage.