Did you install IOS70 patched first?
Uninstalling System Menu or IOS70 will have full bricked your Wii, it's like deleting the Windows folder on a Windows PC that has no USB ports and no CD/DVD ROM. I'm assuming you didn't actually get to the installing Priiloader part.
How old is the Wii? Do you have bootmii/boot2 installed? Do you have a NAND backup? Is the Wii under warranty? Do you have some spare cash to fix the damage you have caused?
Not sure why but your message was Moderated (along with the duplicate).