Hey, I got a t-mobile S5 and the screen is black. Everything else works fine, I can unlock the phone which indicates a working digitizer but the LCD remains black. I tried to heat of the main board to reflow the solder but it didn't work. I have a LCD digitizer combo on the way but before I tear out the original LCD, i was wondering if anyone in Orange County, CA has a test ribbon cable I could use before I start the replacement. Thank you.