[SOLVED] Removing the LCD from Dell Latitude 7390 2-in-1 for hinge maintenance

[Peperonix]

Hi,

I'm used to replacing laptop screens and opening tablets, but I'm having trouble with this hybrid laptop : Dell Latitude 7390 2-in-1.

The screen is working but the display assembly is badly aligned at the laptop edges, so that I need to remove the LCD to perform mechanical adjustment of one hinge or replace it.

This model has four small notches at the top of the display assembly, two on each side of the camera.

The panel can be detached on its top edge, but is strongly retained on its left and right edges.
I don't think I fully understand how the screen lock mechanism works.

I tried using dental floss, to see if the was some double-sided adhesive at the left/right edges but without success as there is likely no adhesive nor glue.
It seems that the left/right edges of the back cover of the display assembly are acting as springs and strongly maintain the LCD into place.

Has anyone here ever removed the screen panel from this display assembly or thus of similar model ?

 

[HCHTech]

Youtube disassembly video available?

 

[Peperonix]

Youtube disassembly video available?

Unfortunately not to my knowledge.
I wouldn't have asked here if I had found one.

There is one showing the hinges maintenance, titled "Dell 7415 2 in 1 LCD back cover replacement (full repair)" but the assembly is different.
On the Dell Latitude 7390 2 in 1, there are no screws at the bottom corner of the display assembly.

The panel seems locked in another manner and I fear benting it if pulling it upwards from its bottom edge.

On the 7390 2-in-1, the touch screen is more like on a tablet and is possibly hold into place by hooks.

The Dell Latitude 7389 2-in-1 and 7290 should be quite similar.
I could not find videos about LCD or back cover replacement ; only about display full assembly replacement.

 

[Peperonix]

If some one here has a 7390 2-in-1 with a broken display it could help to attempt a LCD removal without taking risk ...

 

[Peperonix]

From this picture of the back of a Dell Latitude 7390 2-in-1 LCD panel on eBay, I assume you have to slide the panel toward the bottom of the panel assembly because of the plastic hooks on the top.

 

[britechguy]

I wouldn't have asked here if I had found one.

Check again just using Dell Latitude 7390. I find several.

In any case, when it comes to doing this kind of work in general, but particularly on a convertible, I always get the hinges off of the base of the machine as step number one. That removes most of the stresses that can "break things further" on the screen side of the hinges and makes it much easier to work with "the display part" as a completely independent unit. This usually involves only the removal of the hinge affixing screws, the video cable, and the WiFi antenna connection.

 

[Peperonix]

Check again just using Dell Latitude 7390. I find several.

Allready checked, but the "Dell Latitude 7390" is not the "Dell Latitude 7390 2-in-1".

From the videos, the panel is attached differently on the 7390.

The "2 in 1" variant has a touch screen ; it is like a tablet. Its glass is reaching the top, left and right edges of the screen assembly. I also cannot see any adhesive stripes that I could pull out as seen in some video for the 7390. (see next message)

 

[Peperonix]

Solved.
There are two adhesives stripes, one at the the left and the other at the right side of the panel.
Those adhesive have handles, located at the bottom of the panel, that can be confused with thin flex cables.
You just have to pull out those handles.
The adhesives are not necessarily white, like in this video . They can be anthracite as well.

In summary, the screen panel of the Dell Latitude 7390 2 in 1 is attached similarily to the one of the Dell Latitude 7390.

 

[britechguy]

the screen panel of the Dell Latitude 7390 2 in 1 is attached similarily to the one of the Dell Latitude 7390.

Which is precisely as I expected. Every "convertible" I've worked on (and I don't mean the kind where the conversion is to full tablet and the keyboard is all that's in the base) has largely differed only in that the hinge is "double jointed."

I find "convertible" a largely misused descriptor for a touch-enabled device where the screen can be folded over and the computer stands like an A-shaped table tent does in restaurants, but can't be detached for tablet use.