OMP

Hi all.
My 200 20V has been sitting for about 2 months without battery.
Yesterday I started it with my jump cables. When connected, interior lights went on, so OK.
But then, I turn the ignition switcht to "start" and I hear a "paff" ( fuse blown) sound, very near the ignition switch and the car doesn't start and interior lights go out. I unplug one of the battery cables, plug it again and then car starts, but the auto-check and the onboard computer are absolutely gone....The onboard computer lights up, but nothing else. There's nothing, no little arrow, no numbers, nothing. Same with the auto-check, no nothing....Is there any fuse or I just blew my Auto-Check, obc system? What to do to bring it up working again? Is it repairable?

Reading in the forum, I see that there can be a fuse for onboard computer and Auto check together with other functions...but interior lights, cigarrette lighter seem to work ok....

thanks