It is hard to desolder with soldering iron. You can only desolder using heat gun facing on top of the component with tweezer holding the component to remove.

I have found out it's the issue with realtek sound chipset not the drivers. Every intel dg31gl has same problem And I changed the motherboard.

The reason internal and external keyboard not to work is because the complete Mac os is removed along with MacBook onboard firmware too which is in logic board. So no keys will work from turning on Mac laptops but will detect in windows os that is installed in MacBook. When I contacted Apple customercare is like I'm talking to people who have no knowledge. The only solution you can do is remove the HDD or SSD from this MacBook and insert it to other same model working MacBook which has Mac os firmware that is not erased and install Mac os with your bootable disc or flashdrive that contains Mac os by going to option mode. Just try and check this if it works. And other way is connecting hard drive which has Mac os update or download the Mac os driver and check.

It works fine when connecting to dock speaker and computer but the main apple wall outlet charger does not detect and charge when i installed my brother's ipod battery. The connector and pin everything looks fine physically.

Thank you sir for your answer. I get it

I've tried with my ipod adaptor doesn't show anything.