When started in DeployMode, but without --DeploySql to choose engine type, SetupTV tries to check for existence of MpTvDB database.
This can happen when the user has selected to "use existing SQL server" in which case no DB info is available and SetupTV has to ask for DB connection info. In this case the database may not exist.

SetupTV should never test if database exists to accept DB Connection info. If DB does not exist it will be created.