PSP Bricked?

two weeks ago i recieved a psp from a friend, and yesterday i updated the version to 3.01, using someone elses router(i dont no who, i scanned for a connection and used it)
The update worked fine... when i went to system settings to enable wma playing, it said i was disconnected from the connection i was using (linksys) , i tried it a few more times , but wasnt connected, i then put the usb cable into the psp(not the computer, the psp only) and next thing i know, when i turn it on the screen is blank and theres no sound, only the green light. i looked into it online, people say that it is bricked, but those reports say that the green light turns off after aprox. 20 sec. mine stays on. the only ways i can turn it off are removing the battery and holding the on switch up for 10 sec.
is it bricked?? if so what caused it, and if its not bricked how can i fix it??
Thank you,
Omar