Newly bought a Dell notebook with a drive disk?
Will not burn, there is rectifier diode isolation, installed in the extension line end +5 V voltage should not be too high (some power supply sampling feedback protection), it is best not to exceed 5.2V. I move the hard drive external power supply, regardless of the computer is open or closed are connected to an external power supply, with two years all right. Do not mistake the polarity.
USB cable is too long, the signal is too weak, the voltage can be alone for the two head can be, no effect on the computer.
Bad signal through your way is unrealistic, I was doing communication construction of this line, it is estimated that your location and the base station or indoor antenna from a bit far, rru power shortage. It is the equipment of the problem, they can not solve the. I suggest you directly call the signal is poor, there will soon be the construction team in the past rectification
