Laptop doesn't power on after screen replacement, ESD purge not working.

So I replaced a cracked screen on a laptop, it was working fine before the replacement, just couldn't see most of the screen. Got eveything lined up and looking good, but it won't power on with the battery or the power cord. Tried removing the battery, disconnecting the power and holding the power button down, the reconnecting the power cord, but nothing. The power supply is good because the LED by the charger port lights up when plugged in. The LED light does seem to pulse every few seconds, and the only other discernible response from the unit is that whenever the LED will pulse, there's a small "psh" sound blip from under the keyboard. Otherwise, nothing. Any help would be appreciated, even in just a diagnosis. 

Also, the model is a HP dv6 1334us.