I've got an eReader that is completely unresponsive since I've plugged it in my phone charger. It's one of those Quick Charge charger, so I guess there was a bug and it sent too much voltage to my eReader. I think I've isolated to problem to the power management unit (PMU) chip, a Ricoh RC5T619 (1010 5039QB). Now my issue is that this is a BGA chip, and it's in a crowded region of the PCB. I have access to a hot air station, but zero experience using it, and I've found the chip on eBay. Is it worth a try? Would someone with experience be willing to attempt the repair? Do you know of a compatible chip I could manually solder tons of tiny wires to? I'm confident I could do that. Or maybe just a reflow would work, insulating the rest of the board and heating the chip with the heatgun? Any help is appreciated!