Computer not fully shutting down

Maester Trea

Honorable
Sep 12, 2013
68
0
10,630
Sorry if this wasn't the place to post this, but for some strange reason every now and again my computer will not shut down fully. The monitor says there's no signal so that part is shut down right but for some reason the fans inside the computer are still running and the LED lights are still on and the only way i can fully shut it down is holding the power button.

Anyone know whats up and what i should do?