Battery power leaks to MagSafe input
I have MacBook Air which was damaged by spilled drink. After that system was completely dead. Battery was left connected for a long time after incident.
I was able to clean the logic board with alcohol, Now it starts and runs but oddly:
- If battery disconnected, runs from charger normally
- If battery connected, runs from battery normally
- If charger connected and light green, and then I connect battery, all works normally, and battery charges
But! If battery connected, and then I try to connect charger, nothing happens - light on MagSafe won’t light, system can’t see charger completely.
I think the problem is because I have constantly 4.7 volts on MagSafe input, and charger as soon as detects this voltage, shuts down to safety.
Am I right? how battery currency shuts off from outside world?
I’ve seen 1v on Q7155 4th pin in both cases, from battery and from AC is it normal?