Back in April of 2015, Noh Min Woo sued SM Entertainment for 'slave contract', and asked for a 100 million KRW (~$90,000 USD) compensation, claiming the agency purposely stopped support, and interfered with his promotions. However, SM Entertainment denied the claims, and declared to take legal action against Noh Min Woo's false accusations.
Then On July 20, SM Entertainment was ultimately found innocent of all charges as the court announced, "The evidences provided were not enough to prove that SM Entertainment has continuously interfered with Noh Min Woo's promotion or lacked support. There is no concrete proof."
As a result, the case closed with Noh Min Woo's loss.