There is ribbon cable which is connected with a locking mechanism as in the picture below. The brown plastic locker is not locking properly, is there a way to get another locker and lock it in place with something else, for example glue?
Electronic – Locking ribbon-cable in place
repairribbon-cable
Related Solutions
I think this is the type of membrane keyboard where the metal is extremely thin. It's often not copper foil as you might expect, rather I think it's printed silver paste. Basically, it has no structural integrity of its own, relying on the plastic for that. If you rub away the surface of the metal, you quickly discover that the surface is all there is to it.
If your ribbon cable consists of two layers of plastic, with the tacks printed onto the inside surface of one, then you may have some success. Try to peel the two layers apart, and cut the non-track layer a few mm shorter.
Alternatively, you might try repairing the broken tracks with some wire glue.
Follow the instructions on Repair the Keyboard Membrane.:
Check out Element14. Navigate from all products to "Cable, Wire & Assemblies" then "Cable Assemblies" and then finally "FFC / FPC (Flat Flex)" (http://au.element14.com/ffc-fpc-flat-flex). You can then select 10 connectors and the pitch spacing to 0.5mm and you should find what you need assuming the length is between 50mm to 229mm.
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Best Answer
That's a "flat flex" cable (not a ribbon cable), and the connectors are not really intended to be repairable.
The proper fix would be to replace the connector with a new one, but this requires a person with fairly good SMT skills and equipment.
If you do try glue (e.g., "Superglue", or cyanoacrylate), be extremely careful to keep it away from the actual electrical contacts. I would recommend staying away from the runniest formulations; use one that has a bit of thickener it it.