If tv has hdmi in port, connect 3847 to tv via single hdmi cable. if tv has vga port and no hdmi port, connect 3847 to tv via single vga cable.  
hi I just got my dell Inspiron 3847 d16m out of storage, and I've searched but no luck, for cables needed to connect my tower to my Seiki 24 inch tv. do I need to use both a VGA cable and HDMI cable to make them work?
How to Connect a Dell inspiron 3847 Computer to a seiki se24ft01 TV