BK Precision 2712 Missing Segments LCD Repair

[Pedrofabian]

Hello, I have a B&K Precision Toolkit 2712.
Its missing the bottom segments of all five digits. Other than that everything seems to work great!
After opening it up, it appears the glass reflective LCD panel corner chipped, taking one of the little conductive fingers with it. Pictures attached.
I'd hate for this meter to go to waste for that, it would make a decent little gift or something.

I'd assume not, but any hope for some kind of remedy?
There's definitely no market for parts or anything that I can find.

I'm not really hurting for meters, so risky / destructive solutions are welcome 
-- edit: Looking closer at the pics, looks like the ohms segment is missing too. Also I have the broken piece

[Pedrofabian]

Bump

[Wallace Gasiewicz]

How is the LCD connected. Is it perhaps and elastomer strip?
Disassemble and check the connections.

[shakalnokturn]

That's a tough one!
If there's any ITO left accessible at all:
Try applying a little conductive paint (graphite / nickel / silver) to it to bring the connection out to the thickness of the other glass plane, then you may be able to constrain the zebra to make enough contact on that axis.

[inse]

Use a marker pen to fill the missing segments 😀
Looks like the only remaining option

[Gyro]

From your photo, it's really difficult to get context of how the display is terminated (I can't see any discrete ITO segments that might contact a zebra strip for instance). One idea might be to carefully build up the broken corner with epoxy or whatever to give a flat mating surface with the zebra strip. That would give you something to put conductive ink onto, to connect with any remaining conductive trace.

Another thought. Have you actually checked that there is a PCB trace that is aligned with that broken corner? Normally the traces start a little way in from the ends. It might be that there is just some contamination on the zebra strip and the chipped corner is just a coincidence, especially if there is no evidence that it got chipped after manufacture.

[Wallace Gasiewicz]

I agree with Gyro
Take it apart and see if the zebra elastomer strip is in place correctly and clean it.
You can clean the edges of the strip with an exacto knife. Scrape the conductive surface

[Pedrofabian]

Sorry, didn't see these replies!
Yes, this unit is as a lot of handheld meters, its a zebra strip that mates to the board. I've done all manner of cleaning but I don't think it will help. I'm sorry the picture didn't give much context. Essentially thats a (very) close up of the LCD, which is a traditional glass pane with little conductive fingers that touch the Zebra strip and the conductive pads on the board. The part that chipped was one of the pads. I've attached a picture for better context.

[Pedrofabian]

That's a tough one!
If there's any ITO left accessible at all:
Try applying a little conductive paint (graphite / nickel / silver) to it to bring the connection out to the thickness of the other glass plane, then you may be able to constrain the zebra to make enough contact on that axis.

Hmmm interesting, I'll see if I can't try that.

[Pedrofabian]

From your photo, it's really difficult to get context of how the display is terminated (I can't see any discrete ITO segments that might contact a zebra strip for instance). One idea might be to carefully build up the broken corner with epoxy or whatever to give a flat mating surface with the zebra strip. That would give you something to put conductive ink onto, to connect with any remaining conductive trace.

Another thought. Have you actually checked that there is a PCB trace that is aligned with that broken corner? Normally the traces start a little way in from the ends. It might be that there is just some contamination on the zebra strip and the chipped corner is just a coincidence, especially if there is no evidence that it got chipped after manufacture.

Sorry I tried to get the best angle I could. There is 100% an ITO segment on the chipped piece of glass, which I still have. And you can't see it well in the picture but there might be a tiny bit left.

[jbeng]

Honestly, if the ITO trace is broken off the LCD, I can't see any way to reliably repair it.  I'd check with B&K to see if they can provide a replacement display.
https://www.bkprecision.com/support.html