The Wii console will not play game discs (disc is not recognized).
The system displays either error message "Unable to read disc" or "Disc could not be read."

The Wii console is only compatible with Wii and GameCube discs. It is not compatible with DVD's or discs made for other home consoles. Verify that the disc you are inserting is compatible with the Wii system.
If this problem occurred immediately after completing an update,
An error message may display if the disc is ejected during play. Return to the HOME Menu before changing discs.
Verify that the console is placed correctly.
If the Wii console is lying flat, the game disc slot should be above all three buttons and the SD Card slot.
If the Wii console is standing vertically, the power button should be on the top and the console should be in the stand. Note: Only Wii consoles with model number RVL-001 are intended to be placed vertically.
Verify that the disc is being inserted properly.
If the console is placed horizontally, the disc label will face upwards.
If the console is placed vertically, the disc label will face to the right.
Check the non-printed side of the game disc for dirt or severe damage (such as scratches or cracks):
If the disc is dirty, try cleaning the game disc.
If the disc is damaged or scratched, it will need to be replaced.
If the problem occurs with only one game disc, there may be a problem specific to that game.
Make sure only licensed accessories are being used. Unlicensed products do not undergo Nintendo's testing and evaluation process. They may not work at all with our game systems, and they may have compatibility problems with certain games or accessories.