Envy's Laptop Back Panel Pops Open

[_Dude_]

I have my Envy laptop for 4 years now and I started to notice a year ago, that the back panel would pop open every time I opened my computer. It didn't matter if I tried to open it as slowly and careful or if I just opened it normally. At the beginning it wouldn't matter too much because it was a small opening and I could close the gap after closing my computer. But NOW, Its a huge gap I have to close and its ridiculous. 

It was such an expensive computer, and I took care of it as a baby because I know it wasn't cheap. I've read in other websites that this model had design issues with the back panel material being plastic for such a heavy computer and not having enough nails to keep the back panel closed. 

I just want to know how I could fix this issue because I cant afford another computer right now and all my work is there. Thanks in advance. 

[Huffer]

It's the hinges. The laptop needs to be carefully examined to determine what parts in addition to the hinges need to be replaced.