Nexus 5 New screen and won't turn on

I just replaced the screen/touch sensor. I put the phone back together making sure connections were all secure. At first it just got hot but nothing else. I took it back apart rechecked all connections and fixed the blocking covers I had missed. I tried plugging in, and a flashing red light came on. I tried to do the reset with volume down and power. Eventually red went away and it started flashing blue. I tried the reset again and now no light is on and it won't turn on still.