Originally Posted by pizzaguy

Then (if you haven't already) unsnap the cover off the little box next to the battery. You will find three fuses in there, pay most attention to the 200A one - is feeds the entire car except for hte cooling fan and ABS system. Make sure the nuts are tight on that fuse!!!!!

Now, I am assuming (as George is) that we can take your words VERY LITERALLY when you say "No power at all". That means no dash lights, no buzzers, no radio illumination or display, no dome/head/tail lights at all. IF any of these powered on at the time, you don't really have "no power at all". This is very important, as we can't diagnose electrical issues unless the descriptoin of what was going on is 100% dead-on accurate.