I cant load any channels nor dose any modding work

The wii console itself is in great condition but when i put in a disk and it says press the eject button, remove the game disk, and trun off the power to the console. and even when i try loading the wii shop channel or the news or the mii channel, it works for a cople secconds ad truns black and only somethimes dose it say an the same error as putting a disk in. and when i try letterbombing or the other bomb it dosent show anything. if you hav anymore questions on helping me just repley. thanks