You won't get anywhere if the lipo voltage is not above the minimum of 3 volts per cell. The chargers builtin safety feature won't let it charge a lipo that has less than 3volts per cell. So if your 2S has less than 6v,it won't chanrge, if the 3S has less than 9volts, it won't charge.

It doesn't matter how new or how old lipo is, if its been overdischarged below 3v/cell, the charger is not going to charge it.