DISASSEMBLING AND CHARGER CHECKING

It sounds like it may not be fully charging.

If the port on the tablet is loose/damaged or the cable/charger is failing, then the tablet may not be charging even though its plugged in.

If you can, try a different cable.

Make sure the charger is the correct one for the tablet! Some tablets require more electrical current then a computer's USB port provides. Same thing applies if you are using a 'phone' charger with the tablet, might not be enough current.

Most USB ports/chargers output about 5 volts DC (direct current), but they can vary in the amount of Amps (A) or mili-Amps (mA) they produce.

FYI - the symbol used to represent Direct Current is straight horizontal line with a dashed horizontal line directly under it.

Most computer USB ports only produce 500mA.

Most phone chargers only produce 1A.

Many tablets require 2.1A or 2.4A to properly charge.

Check with your tablet manufacturer to find out what your specific make/model requires and the look closely at the charger you are using to see what the OUTPUT is ... e.g. 5.2V 2.4A

Power off your Lenovo tablet after forgot password. 2. Press Volume UP + Power button on the tablet. In the recovery menu use Volume button to select wipe data/factory reset option and use power button to confirm. Complete steps in Lenovo S5000 Tablet Manual.

Test your charger with a multi-meter, does it output the correct supply? If not you need a new charger.

If your charger is ok, take a look at the charging socket, is it damaged in any way? Does the charger feel loose when it's plugged into the socket? If so you may need to have your charging socket repaired/replaced.

After checking all this the next thing I would try is a new battery. However, most tablets will at least work from main supply, even if the battery is faulty.

From a guess,about an hour.But keep checking on it.