Unfortunately I wouldn't know what "all troubleshooting help" all involves, so sorry if this is a repeat.
When you launch the camera app, does it show a camera icon with a line through it? Or does it show actual error message?
Does your model's F8 have the camera icon? If so, have you already tried F8 key or Fn+F8 keys?
If your F8 is for airplane mode, then look for a tiny and very easy to missed button/slider thing on the lid near the lens. Press it or move it, see if it works.
If that still doesn't work, I need to know your exact Lenovo model number. If you need help finding it, please type msinfo32.exe in the search on the taskbar and hit enter, when it is launched, I need the line that says "System model".
Thanks!