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Question:

The computer suddenly can not identify the printer, suggesting that the usb device can not be identified, Device Manager above the unknown device

Is ADSS cable buried safety protection tube? Terminal near the substation does not work, do not have to protect the tube is feasible?

Answer:

There may be a driver has not yet fully installed, some features are not installed
USBHUB ah. From the description point of view. Your mobile hard drive due to power supply is not enough. There is no normal start. You put your mobile hard drive received books on this way? Your mobile hard drive all the lines are inserted into the USB HUB On the two mouth, at least 1A of the current. Normal hard drive at the time of the start is the most power when placed in the power with the HUB. Because there are seven mouth. Light with the books on the interface to listen to 500MA current is not enough. So to external battery ..USB standard supply current is 500MA /
Mobile hard disk are plugged into the computer USB port usually have two USB jack, is to solve the problem of insufficient USB power supply. Try to plug all USB jacks into HUB? Look at?

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