A540L battery not charging, laptop now won't power up

[rgilbert07]

System: Windows 10
Battery or AC: Both
Model: A540L
Frequency of occurrence: Permanent
Reset OS:
Screenshot or video:
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Detailed description：My wife's A540L stopped charging the battery but would run on the external supply. Checked the external supply and power all good. Battery appeared to be totally discharged so concluded it had probably died so bought a brand new replacement. Fitted that and the system reported the battery to be 45% charged, plugged in and 1 hour 45 mins to full charge. However, the battery didn't charge so tried some online solutions, such as battery out, power disconnected, power button held down for 60 seconds, uninstall and re-install battery drivers, etc. Nothing made any difference the the battery progressively dropped until it showed 0% and the laptop shut down. Now it won't start and does not acknowledge the supply being plugged in.
Is this correct? On most laptops they will run on the external supply without a battery but this seems to need a battery with some power in it to run? As the laptop doesn't charge the battery, is there any way I can charge the battery out of the laptop so I can at least get it to run for a while to get the data off the hard drive? As the laptop is only ever used indoors, it is an option to run it permanently from the external supply, can it be forced to do this by linking pins on the battery connector? Or do I just pull the hard drive and buy another laptop?

[rgilbert07]

Can nobody tell me if this machine should run without a battery or how to charge the battery out of the laptop?

[RAJU_MSC_MATHEM]

rgilbert07

Can nobody tell me if this machine should run without a battery or how to charge the battery out of the laptop?

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I suspect that battery circuit , gold slide plates are not properly , connected to laptop slot.
battery connector on motherboard, battery terminals should checked properly with analog multimeter.

type the following command in cmd with admin rights, upload the file .html file to google drive ,share the link
PowerCfg.exe /ENERGY -output C:\Energy-Report10-10-2020.html /duration 240

[rgilbert07]

I'm a retired radio and electronics engineer and have had the motherboard out to check for dry joints at the battery connectors, found none. In fact all the soldered joints on the motherboard appear fine. Checking the voltages at the battery connector shows that the motherboard doesn't appear to be supplying power to the battery although there is power at the supply socket.
As it won't boot, due to the flat battery, I can't type any command......
Should it be possible for it to run solely from the external supply or does it need to have a battery there? Any chance of finding a circuit diagram anywhere?

[RAJU_MSC_MATHEM]

rgilbert07

I'm a retired radio and electronics engineer and have had the motherboard out to check for dry joints at the battery connectors, found none. In fact all the soldered joints on the motherboard appear fine. Checking the voltages at the battery connector shows that the motherboard doesn't appear to be supplying power to the battery although there is power at the supply socket.

As it won't boot, due to the flat battery, I can't type any command......

Should it be possible for it to run solely from the external supply or does it need to have a battery there? Any chance of finding a circuit diagram anywhere?

View post

You are electronics engineer, so I can't say anything.
but I seen one video,

as per the Microsoft document, laptop can boot without battery work for few minutes but AC power adapter must be connected to laptop, in that document Microsoft does not include the compatible model laptops.