Two days ago my Wii loaded up perfectly fine. Today, it started to freeze and spit a buzzing noise out through my TV's speakers after it sits on the System Menu for a few seconds. I made sure to take out any GameCube controllers, memory cards and even tried removing the SD card. I am able to use BootMii to go into the Homebrew channel and load games through my USB Loader, among other numerous apps. I have not updated my Wii for about a month, so I don't know why it suddenly started doing this freezing issue. I am on System Menu 4.3U What could the issue be, and what other information do I need to provide do get some good advice?