iPad Failed During Software Update

Hey guys,

I had a customer bring in an iPad 7 updating OTA to 14.7.1. During the update, it was charging and the customer left and came back to it to find a black screen. iTunes will not work and of course Apple told him to kick rocks. We have both tried various software to reflash it, including 3U Tools, but we are not having any luck.

In my attempts, 3U Tools would start flashing the firmware, and when it tried booting into recovery mode from DFU mode it would never succeed. I even let it run the 10 minute timer to see if it would eventually work. Just to amuse myself, I measured its power draw and it intermittently draws 0.00, 0.09, and 0.99 amps before returning to zero and cycling through those numbers.

At this point I’ve almost completely ruled out software, so what component do we think it is? Tristar, or perhaps NAND issues?

I’d appreciate any pointers or direction. Thanks guys.