No display after control board and LCD repair

While doing a digitizer repair, the control board was damaged and needed to be replaced. I purchased one on ebay for an iPad 2 but the ad isn't specific on if it is for the EMC 2415 or 2560. There is also no display, but iTunes recognizes the device.. even though I can't type the passcode. I have tried to enter DFU and recovery mode but I never get a prompt from iTunes. I think maybe I have a faulty control board... or its for the 2560 model