Noco GB70 repairs: one won't jumpstart, the other's completely dead

A friend of mine bought a few Noco jump starters from an auction. Two of them turned out to be faulty. Let's find out why. Yes, it's long, as between the two of them there were four faults to track down. For other Noco repair videos check out the SOSfix Electronics channel.    / sosfixelectronics   INDEX 0:00 Index 0:10 Going loco: two jump starters from Noco 4:12 Opening pack no. 1 (working torch, nothing else) 7:12 Checking cell voltages 8:56 Has a disconnect and reconnect fixed it? 10:02 Could it just be a faulty button? 12:17 Fault found! 13:11 A spot of improvisation 15:26 Cramming it back together 17:18 Testing 21:24 Pack no. 2 (completely dead), broken wires! 22:51 Checking cell voltages 24:53 Still not working, time for more troubleshooting 27:30 Checking voltage rails, but something's getting hot! 28:18 Checking for hot spots with a thermal camera 31:47 Out-of-circuit testing of suspect components 40:28 Second fault found: shorted diode 43:41 Now it thinks it's charging when it's not 46:16 Third fault found: another shorted diode 47:52 Fixed it!