hi all new member here, i done a starter electronics course earlier in the year.my problem is i have a makita battery charger and today it went bang.i checked the external fuse and the internal fuse ,they were OK.i have been looking through the electronic board and i can't see any thing that has blown
as i said i have only done a starter course,but it was great,so i want to try and fix it myself.i noticed that the big capacitor 47uf is a bit dented at the bottom. any help would be grateful..

 

A picture might help us diagnose a fault. Can you get a good picture of the circuit board and the items you think don't look right?

 

If it was an audible "bang", don't plug it in again. The only things I know that go "bang" and not "snap" are electrolytic or tantalum capacitors. They sometimes spray foil "dust" all over the circuit, creating various shorts.

Post high resolution and in focus images of both sides of the board so other issues can be guessed at.

 

Dented cap, not pregnant or bulging?

Are you sure the circuit in the battery is not what went up?

Is it a Lithium, Nickel Cadmium or Nickel-Metal Hydride battery and charger?