I have a Inspiron 8200 note book with a Latitude C840 bios vA06.  I am not sure what happened but one day I was hooked up to a switch box and working.  I went on leave for two weeks and came back and the monitor had a message stating (power manager) settings out of range.  The monitor itself would not come on.  I asked around and, of course, nobody touched the system.  When I took the notebook off of the switch box it worked just fine.  I looked at the video adapter and it said C840.  Before it was a Nvidia GForce4 440 Go.  I went to the Dell site and downloaded the flash bios for Inspiron 8200 vA11 and flashed my bios.  After booting back up a message came up stating that the computer needs to be removed from the docking station or it will shutdown.  I removed it and rebooted it.  As it was rebooting I went into setup and looked at the options for docking stations and it was disabled without the option to enable it.  So I knew I messed up I downloaded the flash bios for the Latitude C840 and tried to flash the bios again with that.  As it was booting up a message came up stating "Error! This utility does not support this system."  How could I either flash the bios with the C840 vA06 utility or fix the docking station problem?  Please advise.