Need xbox help please

I built an eeprom reader writer and proceeded to read my eeprom, it worked ok, I then proceeded to write it back to the chip and it worked fine.

But i made a mistake when de-soldering the wires from the LPC. The eeprom reader writer was still connected to the com port of my pc, i started with the SLC wire all i saw was a few sparks flying and my xbox could no longer be swithced on, but power is still getting to the motherboard coz the led to the xeno fx chip i have still lights up when i connect the xbox to the power.

Please anyone tell me how to fix this.