Well now you have to get back to EDL mode. You can try rebooting with buttons or use an EDL cable.
Were you rooted before? Can you get back to normal system? Go to my site and get i2cscan
Code:
C:\>adb push i2cscan data/local/tmp
C:\>adb shell
$ su
# cd /data/local/tmp
# chmod 755 i2cscan
# ./i2cscan
Copy paste the results of the last command.