beaglebone black went off with a pop sound when misconnected it to a 12V battery

I mistakenly connected BBB to 12V battery instead of 5V battery. I heard a “pop” sound and my BBB’s heart beat never beat again :’( None of its five led’s glow. I hope some capacitor went off or does it have any onboard fuse? Is there any way to get it work again?

Well, maybe. You would need to replace lot of parts. Do an RMA request.