My ISDT Q8 doesn’t charge my LIPO (3S, different brands) anymore. The batteries are correctly recognised (showing number of cells, voltage etc). Once I start charging, it changes to the “charge” screen and the timer starts but nothing else happens. The A and mAh remain at zero, regardless of how long I keep charging. Suspecting the charger is faulty I ran a self test and get a “Buck Test Fail” error. I can’t find what this actually means. Is anyone familiar with this error and how to resolve it?