You can just about get blood from a turnip. As long as your ship has at least one functioning Engine module, you can take actions that would otherwise require power even if there is no power in the appropriate system. Doing so causes one point of hull damage.
Note that this means you can take Helm actions or launch missiles with no power at all for free (except for a little hull damage).
You could use this virtual power to operate the Teleporter to teleport an object or a bomb. A Cannon fired with no power using Fume-Runner will have an effective power of 1.