OptiPlex 755 Outer Case Loose!!

the top plastic is glued to the front bezel via a joint.

if the joint is broken, it may be hard to securely attach the top bezel.

@redxps630​ I see, is there a potential fix to this problem?

you can try superglue overnight by clamping down the loose plastic using vise clamp but I had optiplex case that has loose plastic shell that just would stay put.  I am surprised you actually bought this old model from ebay unless it was a long time ago.  if you find a thrown out Opti tower case in e-cycle you could swap case.  not worth buying another case for this.

Some years ago, I bought GX620 cover off of eBay for my previous 755.  Didn't see any glue holding the original cover.  Just had to cut/Dremel one tab off the GX620 cover to make fit.

Other than a different/new/used cover, glue may be the only option as redxps mentioned.

Hello @bradthetechnut​, sorry for the late reply. I've decided I'm going to try and glue down the top plastic on my OptiPlex 755. But I have one important question for you? What is the best way to apply the glue on the top plastic? My concern is that the glue might leak into the internals of the system or get on top of the DVD Drive and that drive might not come out. Thank you.

I'd remove DVD drive and HDD's/SSD's when gluing the top cover in case there's any concern about it dripping.

It wouldn't surprise me if a couple of tabs broke off of the cover during shipping.

I don't know what it is with USPS, but in 2020 when I sold my 755, the receiver said the latch on the back to open the cover was busted.  USPS managed to break a commercial grade PC.  I've also received boxes thru them in very rough shape.

@bradthetechnut​ Thanks for the tip. I didn't know that this was a common problem with OptiPlex 755 Desktop PCs. Knowing the preparations before gluing the top cover back on. How should I apply the glue onto the top cover? There are holes underneath where the clips are, and I can see the holes looking in the internals.

I don't have a 755 MT anymore to look at.  If it's difficult figuring out how to glue it, it might be easier to get a different top cover for it.  Dell OptiPlex 320 330 360 380 740 745 755 760 780 MT Top Cover Lid Housing R6728