This is a 5-year-old washer and dryer combo. It had very strange sounds first, and then it stopped to move at the end of a spin cycle. I opened and found out that the belt came off. I put back the belt and turned it manually. The belt moved towards the tub shell. Then I started the washer. It seems to be working but with small screeching sounds. When it came to the spin cycle, it didn't spin fast like usual, and only spins slowly.
Could it be the problem of the belt or the drive pulley? Or anything more serious? I hope it is simple enough to fix. Please help.