i never replaced it. i just took the glass off, disconnected the digitizer, put the glass back on still cracked. thats why there is no touch.
i have done a ton of research on this. every component inside this machine is labeled n550jv. the entire top tray/wrist rest/keyboard being one piece is stamped n550jv. the hinges for the screen, n550jv, list goes on and on. Also you can get the digitizer/front glass fir n550jv pretty easily. i.make no guarantee of anything. i put it out there, check it out. t5 torx is what you need to remove the bottom tray. you will see immediately.
im just gonna leave mine as is, picked up a new RoG stupid heavy laptop thats awesome. got the q550 as permanent media center to tv with hdmi now