Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Will this work for the 17R N7720 17.3 inch? And is this replacement HD?
Document: The installation on the 17R/N7110 was quite easy. My 10 year old son did most of the work. The screws are small, so be careful not to lose them.The new screen was in good working order and didn't have any bad pixels.One tip:  The YouTube video we watched didn't describe how to remove the video cable. First we unstuck the cable from the old screen starting at laptop side (vs the screen side), which gave us some play.
I received my replacement screen in quite quickly. It was a direct replacement and went together quickly. I will check here for anything else that is needed to keep my aging notebook alive.
Perfect replacement for my shattered screen. Installed easily and works perfectly. Sharp, clear picture. Good colors. I would recommend this to any one needing to replace their broken screen.
I changed it today while watching a youtube tutorial and had no issues, took me about an hour (make sure you keep the screws seperate) but really was a pretty easy swap. I would recommend this to anyone who needs to replace the screen on their Dell Inspiron 17R 5720 laptop.
I bought this screen without doing much research as I was in a hurry when it broke, a few days later I went back and reviewed my order and had some concerns as to weather it would actually be a good fit for my Inspiron 5720 and started to second guess my purchase. At this point I decided to give dell a call and give them my service tag number and see what they recommended for a replacement.
Great quality and arrived in safe packaging quickly, however after 3 days of use some dead pixels appeared in the upper left hand corner and then disappeared the next day. A few weeks latter white lines would show up across the screen. Each week afterwords more lines would appear down the screen.
Then carefully popped support frame slight away from backshell so that I could unscrew 6 tiny phillips screws (3/side) that hold the LCD to the frame. Popped LCD away from frame. Then very carefully, slowly, lifted flat silvery, ribbon cable from housing (it is glued!!!) so that I could remove it from LCD connector. Carefully pulled cable from connector. Swapped in new LCD. Reversed above process. Put battery back in. Powered it up.
screen came packed very well in sturdy box with plenty of padding. It was in perfect condition and easily installed.
i was able to replace my broken LCD screen on my laptop with great ease and quickness, i recommend that anyone with a cracked screen buy this and do the same!
Worked great. No dead pixels, even tho my laptop came with one from dell. Very easy install, took me all of 15 minutes. Buy with confidence.
Answer: Exact oem replacement, not sure about your particular model