Default [Q] Help! Captivate Bricked and not being recognized why?

hey, my samsung captivate has the phone>pc screen and it isn't being recognized by my laptop at all for me to fix this...i thought i was my usb port on the phone but nothings really wrong with it besides me having to tilt it a little for the phone to come on...ive tried all methods to get this thing into download mode but nothing's working...i think the root of the problem is the phone not being recognized by my laptop but idk how to fix that...oh and i already downloaded the proper drivers and can i fix this?..thx