Sounds bad. Did you have priiloader installed? If it was installed and is now not working, not good.
You could try savemiifrii
You could try another power brick
You could try switching from composite/component cable, but I don't think that would be the issue since your wiimote does not sync.
It is possible that your loader, game, cios or some combination bugged out on you and corrupted something important on nand.
Do you have a nand backup?
What version of usbloader gx where you using?
What cios version?