Had an odd problem after doing an assortment of upgrades & wire management. After doing some wire cleanup (my previous wire-work was atrocious) and adding some fans and cpu cooler, I booted up my computer. Odd thing happened. The LEDs on my mouse and keyboard lit up then before getting to bios, they went dead. Keyboard and mouse did not boot. After restarting, the mouse and keyboard lit up and stayed on. I've been able to get to windows and use the computer normally now for about a week, but I noticed last time I powered off the computer that the keyboard and mouse did a little light up and shutoff dance before ultimately staying on during the windows log in screen. Could this be a PSU or mobo issue? I have a P8p67 LE mobo and a NZXT 600W PSU. The PSU is pretty old but hasn't given me any problems before.