I have the same problem - my son has operated with the front USB and he is very sad now. I will try to repair this. But I have no experience with smd - how to do it precisely. When I get back home I will look at the smd transistors - I should cut it out or so? Please tell me some details. In that case it is only problem with Q21 or I have to check the other 2 also. The Q21 is on the main mobo plate or on that part next the front usb sockets. Thanx, i know that is 2008 now, but we still use it (trying to).