Samsung Galaxy A series
|No power / 0 amp pulled from the charger / battery fake charging.
||Try replacing the ribbon connector that connects the bottom PCB to the main PCB over the battery.
The FPC connector can become dislodged and/or easily damaged when clipping in a ribbon cable, when testing check voltage through the charge port, then through the charge port and ribbon connector. If power is constant then clip in the ribbon connector and with a small tipped test probe you can test for power at the motherboard end.