Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
If -all- power was lost, then you would want to go under the hood again and check our your fusible links in the main fuse box AND check the battery terminal and its fusible link. You will find something failed in those areas, as those are the only locations you would expect the entire vehicle to lose power from.
If however you only lost ignition power (the headlights work etc, just turning the key on does not deliver power), then you would still want to check your under hood fusible links for the ignition link being blown, but also you would want to double check your ignition switch wiring and make sure that you did not cut/chaff/pinch the wiring to the ignition switch.