Mine did not work, it acted like it was being touched everywhere, I had to figure it out or go without, I figured it out, Its simple enough to take apart.
Unworkable
http
/tinypic.com/r/3520xus/8
Remove the bottom of the laptop, T5 torx screwdriver or... a tiny flathead filed down to fit cause I didnt have one... Once bottom is off the hinges are plainly visible.
http
/oi61.tinypic.com/2m791uc.jpg
Yes, that is MY Q550LF, I am certain. Notice the hinge says "N550JV-SL" I know that the Q550 and N550 share many of the same components, like the keyboard. So the N550JV screen may be a contender.
Remove the screws holding the hinges in place to make a little room for the black cover that goes over the wireless antenna, it slides to...