Thanks,

I would guess that the device you had plugged into the OBD2 connector was faulty and caused the issue. Since it burned the pins on the connector, I would have that connector replaced and the wiring harness repaired or replaced if it is damaged. Check your fuses. Whatever caused that connector to short and burn the pins would have likely blown a fuse. After the connector and harness is fixed, a new scanner can verify if you can communicate to the computer. If no communication exists, and the power and grounds are working, then it would be likely that the computer was damaged.

If the new scanner can read the computer and it still doesn't start, then troubleshoot the starter system. If the motor doesn't attempt to spin when the key is in the start position, then disconnect the small wire on the starter and check for power when the key is in start. If there is power, then the starter is bad, If no power, then you have a start relay, fuse or something else that is faulty.