XPS M1530: plugged in not charging. Potential fix

After trying every single possible variation from switching batteries, the motherboard, charge adaptor, updating ACPI-compliant control and flashing the A12 bios; I found that nothing really helped the XPS M1530 with this re-occurring problem on my own. When I reverted to A9 bios the laptop began to charge again immediately after installing, to make sure that originally my A12 bios wasn’t in some way corrupted I reflashed to A12, which caused the message “plugged in not charging” to show up again.

Recommendation: Anyone with reoccurring charge issues with the XPS M1530 should try to revert to A9 bios to see if any change occurs. *Note, you must have a battery with >10% charge to update bios.

For Dell: please review A12 power management changes from A9.

Thanks for suggestions from other people posting to similar topics on this board.