Firstly I would check there is any water coming through the valve, even though it appears to be in the open position. Close the valve first, then disconnect the hose on the outlet side of the valve, then check there's water coming through when you open the valve. Use a bucket to catch water. Reconnect hose to valve if you have water flow. Then do the same but this time disconnect hose at washing machine connection to ascertain you have flow through hose. If all is
well could be the machine is not calling for water. More investigation needed. Is there electric power to the machine ? Check fuse in plug ?