USB Blaster Rev C

I have same problem. The blue LED was not fully lighting.

@tag818:

unfortunately, when the pc goes to sleep or hibernate, the usb power supply is going done.

And it is similar to unplug Usb port of Usbblaster when it is connected to a powered board.

You say "the cable may burn out" : could you tell us which component may "usually" be burnt ?

Altera recommends NOT to unplug , is there a more robust cable ? Or good design tips to avoid such a problem.

(Sorry for my English because I am not a perfect English writer :-) )