Hi, I had same problem after upgrade to v44 kernel. Could not reflash, because of empty battery. I saw uboot screen with tux, but it did not go to flashing. I to took out battery, and charged it with external charger. At the beginning, voltage was 3,45V so totally empty. After charging, voltage was 4.05V so almost fully charged. But now, device does not show any picture at all, totally blank. When i plug in USB calble, yellow led flashes for a split of second, but device remains blank. And also power button does not do anything. Any ideas ?