Chosen Solution

I’ve got a Wii that wasn’t reading Smash Bros Brawl, but was reading other games. I tried replacing the laser, but now, whenever I put any disc in, it spins for a couple seconds before stopping. I’ve tried checking the motor and made sure that it’s working, as well as checking all of the connections to make sure that they’re all secure.

do you still have the old laser? put that back in and test. as you stated it was reading all games except one before the replacement, so its likely not faulty. Unless you are running a “cracked” WII, its possible the game disc is from a region outside your area and wont read:https://nintendo.fandom.com/wiki/Regions Usually the region is printed on the label.