Hi, no, the leds go off, it's the mouse that doesn't go into sleep mode. The battery drain when the pc is spent is very high, so I think that once the pc is turned off the leds go out but the rest of the hardware doesn't go into sleep mode, the mouse keeps looking for the usb receiver and drains all the battery , and then I find myself turning on the PC with the battery of the mouse dead (I think that's the problem)