I replaced defective cells with brand new.. I am getting 10v @ positive & negative terminal of ic but my laptop is not starting at all
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Here's a download link to the schematics for the two different motherboard models that may be used in your laptop.
Click on the appropriate link for your motherboard
You may have to trace the circuit back from the battery terminals to see where they go to.
Have you tried uninstalling/reinstalling the Microsoft ACPI-Compliant Control Method battery drivers in Device Manager?
crwdns2934105:0crwdne2934105:0
I have different problem sir.
On multimeter i am not getting output voltage from bms... That to from + ve terminal..
One of the schematics above should be applicable to your motherboard.
If you're not getting power out from the BMS verify that power is getting into the BMS on the correct terminal to actuate the BMS and not just that it is power being fed through the BMS.
You will need to know how to read schematics to work it out.
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Hi @sumeetbadyal
What is the complete model number of the laptop as shown on the information label on the bottom of the laptop?
Does the laptop start with the charger connected?
10V doesn't seem enough voltage as most batteries are 12V when fully charged
crwdns2934271:0crwdnd2934271:0 jayeff crwdne2934271:0
Model number is lenovo g580.
Yes it does.
On the label of battery it is 10.8v /4100 mah written..... Which I am getting at input terminals of bms...
But i am not getting any output from output terminals of bms
crwdns2934271:0crwdnd2934271:0 Sumeet Badyal crwdne2934271:0