430EX II won't turn off

[perzec]

I just discovered that my Speedlite 430 EX II won't turn off. When i flip the switch to off, nothing happens. The speedlight stays on. What should I do to fix this? 

[RobertTheFat]

If you have any thoughts of fixing it yourself, take the batteries out, and fire it a few times to drain the capacitors before you open it up. High-voltage electronic devices, even small ones, can deliver a painful shock if you're not careful.

[Waddizzle]

---

@RobertTheFat wrote:

If you have any thoughts of fixing it yourself, take the batteries out, and fire it a few times to drain the capacitors before you open it up. High-voltage electronic devices, even small ones, can deliver a painful shock if you're not careful.

---

Painful shock is an understatement.  It only takes 25 mA to stop the heart.