Targus broke 3 times?!

[FreddyMro]

Hi,

When I tried to wire up the Targus Usb-Hub the first time, I accidentally connected the black wire from my ground to the blue wire on the Targus. Moreover I cut off the 4th USB-port like it was shown. However, the thing seemed to be dead.
Thus, I bought a new one, I wired it up (unfortunately I switched the blue and the black wire again) but I didn't cut the 4th port, this time. Anyhow, it seemed to be dead again.
The third time, I modified NOTHING on the board (I do even still have the ports on it) and I wired the black to the black cable. Before that, I tested it on my computer and it worked. Then, I connected it to the Pi and it seemed to be dead AGAIN.
In desperation, I wired it up to my computer and it doesn't recognize any USB-device connected to it. My computer only recognizes the board itself, since the command lsusb (I'm using Linux) gives the following output for the hub:

Bus 001 Device 028: ID 05e3:0608 Genesys Logic, Inc. Hub

But neither a Keyboard nor a USB-Stick is recognized. Before I wired it up to the Pi it worked.
Have you made any experience with that type of problem?
I'd really appreciate your help!

Update: I tried it again this morning and it's not even listed in lsusb any more. Windows gives the error code 43 in device manager.

[FreddyMro]

Okay, after reading through so many forums, I finally found the answer.

My Targus was NOT broken (I guess none of my 3 was). The Targus seems to be VERY sensitive concerning the impedance of the data cables (green and white ones). Thus, all I needed to do was placing the Targus directly next to the Pi to have the wires as short as possible. And it worked! Maybe it is also possible to use thicker cables but I haven't tried that out.

This problem could also refer to other USB-hubs since I saw many people having trouble with theirs.