Nexus 4 Touch Panel Replacement Issues

Hi,

I recently dropped my Nexus 4 and the front glass of my phone is broken. The actual display doesn't show any signs of damage and it's only the touchpanel (digitizer?) that's damaged. After looking through a lot of videos online, I realized it is possible to replace only the touchpanel while using the existing display itself.

So I ordered a touchpanel online from Amazon and received it a couple of days back. I have disassembled the phone successfully and even carefully removed the broken touchpanel from the display. The dissplay boots up fine, but the moment I connect the new touch panel, the screen goes completely white. I have rechecked all the connections and everything seems ok to me, but still unable to figure where the problem lies.

Can someone please tell me if I am doing something wrong or the new touchpanel I ordered is defective? Any troubleshooting techniques to identify where the problem lies?

Thanks