phone is shutting down suddenly

hi everyone , am facing a problem with note 3 which is suddenly and without a specific time shutting down,but what i observe is that when keeping it charging it doesn't shut down but at the moment i remove the charge it shuts, i changed the charging port flex, the battery, i dont know what should i do now, so plz i need ur help, thx in advance

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Hi,

I'm wondering if it shows that it is charging the battery but it actually isn't.

Can you test the battery voltage using a Voltmeter, when it has shut down?

Disconnect the battery from the motherboard and test directly across the +ve and -ve connection from the battery.

OR

You could connect the Voltmeter across the battery/motherboard connection when you are just charging the battery in the normal way (tablet is off) and see what the voltage reading is with the charger on and then off.

Be careful with the meter test leads that you do not s/c (short circuit) anything by 'bridging' one (or both) of the probes across two points etc.

Do you always charge the tablet with it on? If you do not do this then ignore the following.

If so what is the DC output current of the charger, (it is written on the charger)? It may be that the charger cannot charge the battery and run the tablet at the same time and gradually the battery has discharged.

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