why did all the gauges drop?. not reading temp, speed, rpm or gas?

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while going down the road my truck started beeping at me. all the gauges dropped, not reading the speed, temp, rpm or gas. then she told me i was low on fuel cause the gauge dropped to empty. i had 3/4 tank in her. i pulled off road and turned her off. when i went to start her again, nothing. the battery was still working cause the radio was still playing. it took about 10 mins before the truck started again. i got her back home with no more problems. why did that happen? what should i have checked? this is the first time she did this.