Razer Mouse stays lit up when PC is turned off

"These mice take their light simply from the USB power, without needing to have the system on. It's on the electrical point of view, there is nothing to turn it off in the mouse itself.

However, there is probably a way to tell your computer to cut the power from USB when it's off. I'm not sure, but it could be from a ""USB wake-up"" option in the Bios (giving you the possibility to wake up the computer from a USB device). So you could check your Bios about such option eventually.

If not, then it is probably something with your motherboard, and besides turning off the back switch, or unplugging the computer, I don't see a way to fix this."

"in the synapse program under lighting you can now have the lights turn off when your display is turned off.
(shutting down the p.c. or putting it to sleep, not just turning off the monitor with the power button unfortunately.)"

"Haven't tried it, but this might work:

Enter Control Panel / System (Hardware tab on XP).
Click Device Manager.
Click the + at Universal Serial Bus Controllers.
Right-click on the USB device representing your mouse and select Properties.
Open the Power Management tab.
Check Allow the computer to turn off this device to save power.
Click OK.

or it might only work for sleep."

"This answer does not turn your mouse off, but it is what alot of us do to cover all those beeping bright LEDs that manufacturers insists on putting in our devices...

... we tape them up, with strong, non-residue, highly-opaque insulating tape, so they'll never see the light of day (pun intended).

From this...

To this..."

"Recently fixed this problem by switching profiles in Razer Synapse 2.0 on mac.

If you open Razer Synapse which is the device manager for Razer mouse products, you can create and change button and lighting profiles. Creating a new profile and checking the 'turn off LED on when monitor is off' checkbox fixes the lighting issue described in this thread."