TI-84 Plus Silver Edition - fried because of overvoltage on I/O

[jam...@gmail.com]

Hello,

Few years ago I fried my TI-84 Plus Silver Edition. I connected a photo flash lamp to the I/O micro-jack socket, I was dumb enough to think that I would be able to trigger flash from the calculator. As I know now, the voltage on the photo flash can reach ~200Volts.

Now the calculator seems to be dead, no response at all. My question is: does anyone have the circuit diagram for this model? What is possibly fried? The CPU itself? Can I replace the chip somehow and reflash it? I think that service costs with an authorized service would exceed the market value of a new calculator...

All the best,
Kacper