Dell Optiplex 780 rear 3.5mm jack problems

[NoHamNoJam]

When I plug in my mic in line is displayed.
The mic it self doesn't work.
I can't use the front jack anymore because I accidentally ripped it out (oops)

 

[william p]

The damage at the front may be effecting the rear also. Maybe a USB or PCIe 1x, pr PCI sound card.