Portable navigator upgrade map, plug in the computer search hardware, how ah
Manually add hardware, or enable the windows hardware search function can be found in the control panel of the function, if you do not check the data line interface and the host computer USB interface to ensure that the hardware failure.
My experience is not very rich, the feeling seems to be socket or data line problem, you try to move the data line or a USB socket to see.I'm sorry I can't help you too much.
Tip: part of the hardware needs to install the driver can be used online, according to the steps I said to troubleshoot the problem which can be solved.
