1994 Cadillac Deville

Have never had problems with my car then one day the car refuses to turn on as if the battery had died. The next day the car turned over no problem then did it again. Screen came on then would go out as if battery problem and wouldn't turn but the radio and antenna had power. If I moved the key from start back to off n tried again sometimes the car would turn on. Now the car refuses to do anything, other than have the radio turn on sometimes and the antenna go up n down sometimes. Battery checked out good and no corrosion on the terminal. Of note when I was driving it last there was a complete loss of electrical power and I had no console or radio for five seconds but the car stayed running no problem just had no gauges or music. Possible solutions or problems the car has?
December 14, 2012.

Do you have a multi meter to do some testing?You could have a bad ignition switch?

Dec 14, 2012.