Sounds like the laser could be the culprit. Try unplugging it and letting it sit for about half an hour. This will allow all the internals to cool down. Then plug it back in and power it up. If it works it is likely that the laser is on the way out. If it still does not work then your laser is probably dead and you need a new one. Don't bother with a lens cleaner. They are a big waste of time and money. You can get a new laser for about $10. You'll need a tri wing screwdriver to take the wii apart but the laser replacement is pretty simple. There are lots of tutorial videos on youtube. You can get the tri wing screwdriver at http://nintendoscrewdriver.com. They ship for free. Use coupon code: mariokart to save 15%.