Repairing Your Sonicare - best toothbrush in the world

This thread has beenit-
In addition to the project, there are a lot of suggestions on how to fix Sonicare and regroup them together.
I hope all the comments below will help people bring toothbrushes (
Or lock or glass cutter, etc)back to life.
Circuit board with on/off switch, two AA sized rechargeable batteries below.
This is the coil at the top that controls the vibration of the brush head.
I know there is a magnet on the head, but how it works. . . ?
Here are the 8 points that must be removed from the base.
The four consecutive connections are the top heads;
The 2 below is the battery power lead.
The bottom 2 is the charger lead.
Please pay attention to all corrosion. . .
It is difficult to loose all the points, in part because many leads are welded to them under the board, which seems to add to the soldering I removed.
I heated it in tighter places with crocodile clips and paper clips.
The line shows the corresponding wire.
I tried to get it down with a toothbrush (
Don't tell my girlfriend! )
But had to scrape it off.
This is how it looks. . .
Below is the look of the board after I scraped off the corrosion.
It looks like I may also be damaged by overheating while trying to remove the weld. Beyond hope?
Can it still work if I clean it?
What's under the blue capacitor (? )
Another note for anyone who is interested in replacing the battery is: they are standard sizes, but they are the same material that holds the coil.
Cut off the plastic film around the cells, take out the cells, and then pull out the plastic to remove them.