1999 Honda Odyssey Dashboard lights and dials went dead

I was just driving my car home from getting it inspected when all of a sudden the dashboard lights and dials went dead but then a split second later they turned back on. The check engine, TCS, ABS, and brake lights stayed on until I got home. It drove fine. It starts up fine. Last week I did have to jump the battery because I had'nt used the car for a couple weeks. Might this be the main relay? What's your diagnosis?