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Well If the battery is fine than check the charger because it can also mean that the charger not working and you need new charger for Or you can also check for the driver in your system if an outdated driver you found which in related to power issue that you should update or fix that driver by using a good driver updated software
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The charger and the driver are all ok
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Does this happen with every battery you put in or just this one?
由 Ember 完成的
Every battery
由 Albert Maliro jnr 完成的
@Albert Maliro jnr
What is the model number of the motherboard as printed on the motherboard itself?
Just verifying whether you can turn on the laptop OK but it just won't charge or whether it won't turn on either with a good charger connected?
由 jayeff 完成的
How do I check the model number?
Yes I can turn on the laptop properly
由 Albert Maliro jnr 完成的
@Albert Maliro jnr
You will have to open the laptop and find it printed on the motherboard.
Here's a guide - HP EliteBook 840 G1.
Just asking as it seems that there are different 840 G1 models that have slightly different motherboards and I suspect that when you reversed the power you damaged a component on the motherboard and the correct schematics will have to be found for it to know where to look and what it may be or is (if it is burnt out and can't be recognized).
When it is open you can also look for any obvious damage i.e. burnt out components
由 jayeff 完成的
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