Dont turn on,dont charge

the console was discharged to 0, charging was not at hand, it was not correctly connected to the power supply up to 5v, attached to the battery at the extreme contacts, and at the same time to the terminals inside the battery compartment, then it turned out to buy external charging, the battery was charged, the indicator on charging shows that the battery is charging, the output shows about 4.10 volts, I measured it with a multimeter, but the console does not turn on, there are no signs, help who knows, thanks.