Hi, I'm having the boot loop problem with my n900. I read that it can be fixed flashing the device but my cellphone doesn't has the usb port, today I took it to a technician and he told me that this piece can not be replaced because it is oxidized on the plate so I can't´fixed the boot loop problem,
how can I fix it? can I connect the usb cable directly on the plate ?
please help me!!

I'd imagine that even if PCB traces are so badly oxidized that you cannot solder the USB socket pins to it you should still be able to solder a short length of wrapwire to the socket pin and find a PCB via to solder the other end of the wire to.
That should even be better than the original socket connection