05-31-2019 06:18 AM
My Lenovo G710 works fine when it is plugged in and the battery is removed. With the battery installed and the AC adapter plugged in, the battery isn't charging. Note that I do NOT get the message "Plugged in and not charging" from Windows when I hover the mouse over the battery level indicator. Rather, there is no indication that the laptop is plugged in at all. The battery level indicator does not have the plug icon on it.
However, as mentioned before, if I remove the battery completely and plug the laptop in with the AC adapter, the machine works fine.
After the battery was completely dead (the machine wouldn't even turn on with the battery installed), I tried leaving the laptop plugged in with the battery installed overnight with the machine turned off. The next morning, I started the machine, and the battery level indicator in Windows showed the battery level at 1%.
Is this most likely a problem with the motherboard, the battery, the AC adapter, or something else?
05-31-2019 07:29 AM
Welcome to the Community Forums.
The battery led itself is a hardware indicator that shows battery may be bad.
Since you mentioned having it connected to charger while off overnight and still do not show any battery led activity suggest the same.
If the machine would not power on while connected with the ac charger and battery connected then we need to have it checked further on the board level.
A spare known good battery can be handy to help isolate what I hope is just a battery issue.
I hope this helps answer your query.
Update us how it goes.
05-31-2019 08:09 AM - edited 05-31-2019 08:22 AM
Hello. Thank you for the helpful information.
When you say, "The battery led itself is a hardware indicator that shows battery may be bad," how will the battery LED indicate that the battery is bad? Will it flash a specific pattern to indicate that the battery is bad?
05-31-2019 08:27 AM
If you try it also on another laptop, removing the battery would also show no battery indicator alit.
Else you would be looking on a worst case scenario. From the hardware manual (page 22), " If the charge indicator still does not light on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section".
You can further be checking the battery pack with a voltmeter as shown on page 22. This would help isolate the issue.
Flashing battery indicator (page30) would indicate probable charge if the machine detects the battery.
05-31-2019 09:14 AM
Thank you for the additional guidance.
Unfortunately, I don't have another laptop that uses this battery, so I can't do that test right now.
I could use a voltmeter on the battery, but from reading page 22 of the manual, my understanding is that this will just tell whether the battery is discharged. I know that the battery is discharged. The problem is that I don't know why the battery isn't charging when the laptop is plugged in. I am not sure if the problem of the battery not charging is being caused by a faulty charger, motherboard, battery, or something else.
Thanks and Regards.
05-31-2019 10:14 AM
Since it works while plugged in the ac charger, then we are sure it provides power required by the machine. You can try the same charger on another compatible laptop to isolate if available or another known good compatible charger.
The battery however do not charge, no battery led indicator and no changes even when left connected for long hours. It does not power on the machine and most likely the voltage meter would confirm probable failure.
If the voltage is still less than +11.0 V DC after recharging, replace the battery.
If the voltage is more than +11.0 V DC, measure the resistance between battery terminals 5 and 7. The resistance must be 4 to 30 K. If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board.
Two parts that are easier to isolate before exploring board failures.
Costing options to consider:
Service center labor cost to check (they have devices to check and perhaps spare chargers and battery), price of ac charger, price of battery, price of motherboard.
I think this would cover what you have in mind for the next step to do.