Broken 3ds XL Back Camera

So I have my modded 3ds xl and I the back camera does not work. When I use the camera app the front camera works fine and takes pics but when I switch to the back camera the whole system freezes and bricks, have to hold the power button to turn it off. I’ve already opened up the back for the bottom and reconnected the ribbon cable and same issue.

Should I figure out how to open up the top and inspect the ribbon cable there for damage? What other things can I do to troubleshoot or check to see what exactly is broken/wrong?

If there is damage and the back camera is not fixable how much of a pain in the ass will fixing it be for someone who opened up their 3ds for the first time the other day?

Please let me know the answer to anything I asked or give tips or suggestions! Anything helps.