Idiot lights all flashing sometimes, along with the radio screen?

Intermittent electrical issue

Idiot lights all flashing sometimes, along with the radio screen and the little screen in the console that shows temp and direction goes to all ----

They will all light up for a few seconds, and then it goes away. Most of the time without any effect on the way it drives

I cleaned and reattached the 3 ground connections coming off the battery

Alternator putting out 14.5v

Battery fully charged

Not sure where to look next

Thanks for any and all help