How to re-attach my Inspirion Screen?

So, my laptop's (Inspirion 13 inch 5378 2-in-1) screen fell off the other day, and I literally mean it just fell off. Not at the hinges, just the screen portion fell off from it's backing. Everything is still connected, so I pushed it back in and it still works fine, I can still use it as a touch screen and there's no cracks or any kind of damage, but it's also really loose and I have to hold the edges when closing it to keep it from falling out again. 

It's still under warranty so I know if I have to I could send it back, but I'd really rather just do it myself rather than waste who knows how much time since I know I'll have to mail it in for repairs. This won't be the first laptop I've had to fix on my own, not by a long shot, but it would be the first touch screen. I've found tutorials for older models and non-touch screens, but I'd really appreciate a step-by-step to get my screen secured again without using something like duct tape.