I have CQ40.The battery not getting charged.

1. Compaq CQ40
2. Free operating system [ Ubundu]
3. Battery not getting charged in my CQ40 laptop. But its getting charge in other CQ40 laptop.
4. Its a long time problem. So i have changed some part related to power supply in mother board as per a service technician.

Clean the dock connector with a soft, dry brush.
Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new).  Try each of these in order until the issue is resolved.

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