After updating my Wii U to 4.0.2 I noticed when I power off my system I'll see a small graphical glitch in the top left corner of my screen. If I turn it off while I'm at the wii u menu or game it looks like a small box of about 4 or so pixels, if I turn it off while on the Internet browser it's a small thin line about half an inch long. This never happened before the update. I also don't think it's tied to the gamepad but the Wii U itself. The reason for this is if I use the tv button and turn off the gamepad nothing appears. I tried it several times and nothing happened. As soon as I turn the system on and power down the Wii U the glitch appears. I was wondering if anyone else had issues. It could be corrupted files or update, I don't know. I'm not sure if formatting would fix it.