X52 doesn't detect from Win7

After a blackout my X52 doesn’t work.

I use only the throttle but when I connect it on usb port on the display i read “Saitek x52”, the keys are light but Win does not detect the device. I change several usb port without difference.
I remove the drivers and SST software but the issue remains.
What do you think about? Is it possible an hardware issue of X52 or not?
Tomorrow I will meet a boy that sell me another X52. I wouldn’t is an S.O. issue…

Simply the X52 is broken…
I just buy an used X52 and it work perfectly…