Turn the wii off. Hold the reset button, turn the wii on, keep holding the reset button. Hopefully priiloader will load. If not, you can try savemiifrii, but your wii is probably fully bricked if priiloader is not loading.
It could be hardware, but that is doubtful since it happened after installing priiloader. If you can't get priiloader or savemiifrii to load, you'll need to have the nand reprogrammed. Possibly you could test to see if the wifi module or dvd drive has gone bad, but doubtful. Priiloader and savemiifrii would work if the bt module was bad, so probably not the bt module. You should be able to turn the wii on with a synced wiimote.