Wii question?? 10 pts 4 best answer?

my wii once in 2 weeks it gave me on a black screen error eject disk turn off wii and go to the operation manual so in the manual they said try again if it works and if for a second time it doesnt go 4 wii website but 4 me i tryed to restart my wii an it worked find for only restarting it once and now its been the 3rd week without a prob. What does this mean is the console in a bad STATE OR IT is a normal thing bcz it happened once???