Working on a dead 820-00850. After removing a shorted capacitor (C7651), I get PPDCIN_G3H at 20V, PPBUS_G3H at 12.3V, and PP3V3_G3H at 3.3V.
I tried a DFU firmware restore which showed an error the very end (“The System cannot be restored on this device.”), presumably because the machine cannot start up.
What can I troubleshoot to show why PPBUS_G3H fails to go to 12.6V?
I tried a DFU firmware restore which showed an error the very end (“The System cannot be restored on this device.”), presumably because the machine cannot start up.
What can I troubleshoot to show why PPBUS_G3H fails to go to 12.6V?