Hi forumers I have just received a 2010 13" MBP from my client (i do repair, refurb and resell as side line) and the problem was that the MacBook Pro does not charge, at all. It runs on AC power fine. I do have quite a lot of experience in repairing Macs, so ive done all the standard steps such as: 1. Resetting PRAM, SMC/ newly formatted etc etc 2. Took the battery out, plug into another Mac, confirmed battery is working well. 3. Ran Apple Service Toolkit and done MRA. Software reported no faults. 4. In System Profiler, under Power tab, charger is detected correctly (60watt) but showing "Not Charging" 5. Replaced the MagSafe port, old one tested out okay too. 6. Charger LED is green (indicating fully charged when its not) Things i know. - No more warranty on this unit, not interested to send to Apple to repair. - I have some knowledge on component repairs, if its motherboard, anyone knows which chip is responsible for battery power management? Power IC tested out fine. - Battery connector on the motherboard is tested working and delivering required voltage (im confused at this stage, THEN WHY ISNT IT CHARGING?) - Is it possible to be a SMC software problem? Because every time i do a SMC reset, the battery although at 0%, its telling me "Battery is Fully Charged"; again, this battery is checked out. If yes, how to/if its possible to update/reinstall the SMC? - If i charge the battery else where, such as another MBP and plug it back in, it works with the battery showing 100%, but when it drains, its not gonna recharge. So that means it can use the battery, it detects the battery, but simply refuse to charge it Problem is the board seems to think the battery is fully charged when its not.