samsung captivate bricked

Hi Guys i need to know because one person brought samsung captive bricked not charger and i charger the battery on other samsung captive i put the battery full on the phone brincked and the screen on then the phone is in mode download but one issu when i put de usb on my compute the phone don't connect on odin and i put off the phone and on phone present boot att ..... so present cyanogenmod and Miui XD have 2 OS when in miui boot the phone down and y dry again phone in home screen very slow and a wait connect the phone on my pc and don't connected.
what happend why the phone ??? i don't know is the driver phone don't have ?? i don't have idea what happen why don't connected will work driver phone with usb jig ???

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