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Released June 2009 / 2.66, 2.8, or 3.06 GHz Core 2 Duo Processor

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Can I wire power directly from the MagSafe connector to the battery?

I opened my MacBook Pro to tighten loose screen hinges and did not disconnect the battery when doing so (as iFixit instructed) as I did not have the correct tool at the time. I must have shorted something and caused some damage to the logic board as ever since the battery will not charge.

Machine works fine from AC power when charger is connected

Machine works fine from battery power if battery is charged in another machine then transferred to mine

Steps taken

1. Reset SMC / PRAM

2. Taken to Apple who tried changing the MagSafe DC board, battery and charger.

Conclusion

Logic Board needs replacing.

My question is

Can I directly wire power from the MagSafe connector to the battery internally?

UPDATE

Strangely after this machine has sat unused for a couple of years when I plugged it back in the battery started charging. I reinstalled Snow Leopard (as HDD was blank) then upgraded to Yosemite. Now I have the same issue. I don't think this is OS specific as the battery will not charge when machine is powered on or off.

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Hello,

Honestly you can take as many step as you want but if you toasted the battery it is time to replace it. Also you 2009 could probably use a new battery at this point.

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Sadly, it sounds like you're charging logic is damaged on the main logic board.

Bypassing the logic to power the system directly is not a solution here. You will more likely damage more of your system. The best thing here is to get it repaired.

The MosFET transistors and the comparator chip can be replaced. It does require SMT component handling skill so you may want to try to find someone with the needed skills and parts to fix it locally.

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After battery has been totally flat for a couple of days and I attempted to remove logic board (have torx set of drivers but can't find my small phillips drivers!) to check continuity on fuse F7040 mentioned in below post. I did manage to disconnect battery, remove fans, disconnect camera, optical drive, subwoofer and hard drive cable. I was unable to remove phillips screws so reassembled what I had removed. The battery is now charging but I'm pretty sure that the problem will return as in original post update.

SMC / power / charging circuit problem

I was unable to to remove logic board to check fuse but would it be safe to say the fuse is OK since it is now charging?

Would the fact that it is charging now indicate that all MosFET transistors are also OK and the problem lies solely with U7000 ISL6258A chip?

I cannot see any obvious physical damage to SL6258A chip.

tarafından

It's been charging for over 20 minutes and hasn't past 1% :(

It started at 0%.

tarafından

Never got past 1%. Shutdown, reset SMC then rebooted. Not charging again.

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