Could have died from being off for a couple of days I had an old freezer I left unplugged over the summer because I didn't want to pay for the electricty to run it as it was empty. When I went to start it up it never got cold.
If you hit a refridgeration line you should have hear a fairly loud hissing sound as the gas escaped. Unless you couldn't hear over the sound of your drill.
Do what you like!
Brew what you like!