brandon, sounds like the charging port on your logic board is loose. You need to disassemble your captivate. [http://forum.xda-developers.com/showthread.php?t=740022|Here is] a great site that will show you how, the part is available at places [http://www.globaldirectparts.com/Samsung-SGH-i897-Charging-Port-p/smsng6086090.htm|like this.] You will have to resolder the port. Hope this helps, good luck