Keys CDE-3 Not Working on IPC Laptop Keyboard - Diagnosing & Resolving Issues

Hello
The problem is that after turning on the laptop the keys stopped working CDE-3 , these are the keys on one line at an angle when looking at the keyboard.
Additionally, you can see what this keyboard looks like.
It is an IPC laptop.
It's a bit strange that the keys suddenly stopped working that way.
I checked the tape on the connection if it did not come out and everything is OK, possibly something in the keyboard itself.
I do not know if the F3 key works in this line, possibly not, but the rest works perfectly.
I am asking for some advice.
Thanks in advance.

I do not know what solutions are used in laptop keyboards, but I assume that there are also 2 foils with paths. Dead keys use one common path, which has probably been broken - hence all 3 keys do not work.

Oh, I have a foil from my existing keyboard under my hand:] Let me add that it was a desktop PC keyboard. On the common path there are the following keys: C, D, E, 3, F2 - in laptops the "efy" functions are shifted to the left, in order to push as much as possible, hence it would seem that you should also have F3, but it is also possible that the constructors did not deviate from the standard solutions and it will be F2 ...

In any case: if your laptop's warranty has already expired, all you have to do is start repairing it yourself. Dismantle the equipment and get to the keyboard from the inside. Take out the foils [there should be 3 foils ripped together at several points. The dead path will rather be on the lowest foil - this is the case with me. To easily find the right path - put the foil on the keys If you just arrange the foil [the round points on the foil must line up with the buttons], you will easily find the path. If you can see damage - it's ok. Otherwise check the path with a multimeter using the buzzer function [measurement of continuity of the circuit].

After locating the damage, it must be repaired: it can be easily done with electrically conductive glue - you can buy one from some stores. Remember to apply the thinnest possible layer of glue - otherwise the foils will stick out too much and it may be even worse than before the repair. If you cannot buy glue - you can try to use a soft pencil - run the pencil hard a few times over the damage, the graphite will replenish the damage, but this is not a very sure method.

If you have any other help to repair the path - write boldly, then you will apply it, then we will think and determine if the method will be appropriate.

I wish you a successful repair

I used a conductive glue to repair heated car windows, additionally sticking strips of aluminum foil.

finally found the fault site.
This is the first foil from the top.
The pause is next to the SPACE button, so the Space bar is also with the other three buttons together, only there is a pause right after the button.
Unfortunately, I do not have conductive glue, I put the nail on the nail for a moment as shown in the photo and the connection is made, but this is not a solution.
A pencil, if it helps for a short time, or maybe not, a soldering iron is out of the question because it will melt everything.
I was thinking about mixing silicone with powdered tin paste.
I think I can look for this glue in stores.
Maybe someone has a different solution, I'm waiting.

pinio6 wrote:

I think I can look for this glue in stores.
Maybe someone has a different solution, I'm waiting.

Congratulations on your progress!

The soldering iron comes off due to the temperature and thickness of the connection.
For now, all you need to do is look for the glue. Unless we come up with an even better way ...

Well, I found an electrically conductive glue and it works.
Previously, I used the glue to repair heating windows in cars, but unfortunately it did not help.
Thank you for all your advice and best regards.
Topic is closed.