S60 Display will not install - blank watch face

I was connected to Garmin Express and performed some updates including (apparently) Approach S60 Display 2.40. After a message that all was complete, I unplugged my watch, and the screen went blank - on, but not displaying anything. Now I can turn it on and restart it, but nothing shows. If I plug it into Garmin Express, 90% of the time it says "up to date", and 10% of the time it says "Software Update" at which point it tries to install Approach S60 Display 2.40 for about 3 seconds before disconnecting and reconnecting the watch. Now I am left with a blank watch. Help please!