How to repair a section on the keyboard?

Question

Iron

Notebook ASUS F553MA
Windows 8.1
Started having problems with the keys: 6, 7, y, u, h, j, n, m
Regardless of the layout - rus / eng
Symptoms: print only if you press several times. Does not depend on pressure. Sometimes you have to click a lot. Sometimes less. Now I am writing a post - in general, everything works perfectly, which is extremely rare. Doesn't look like mechanical damage.
Circumstances:
- did not fall, was not subjected to physical violence.
- I installed new software before (MS SQL Server), but after installation everything was ok
- I myself do not use it all the time, several times a week, no one uses it except me. Once turned on, but it is buggy.
Googling, I tried:
1. Install Windiws updates (deliberately disabled). I found out what the System Interrupts process can influence, looked at it, saw that it was eating a lot of CPU. Googled more, found out that if it eats, then you also need to install updates. Everything came together. After the updates, the process stopped eating the processor, but the problem was not solved.
2. Reinstalled the keyboard firewood.
P.S. Thanks to the keyboard gods for letting me write this message without any problems.

Answer 1

Disassemble the keyboard. I had it fogged up and I had to dry it (asus eee 901), wore it to the university, cooled down to -30. I turned it on in the walk, and even a cup of hot tea next to it ... Disassemble - pull out the keyboard block, a plate with keys. If there is a vacuum pump - vacuum and warm up to 40-60 Celsius. You can vice versa in a pressure cooker and a pump. But it’s better to immediately remove the buttons and paste the films to dry (and inventory). At the same time, wash the buttons, the panel under them ... I sealed it with vaseline in the summer :) In winter, I had to wait for warming up so that the keyboard would print (contact through vaseline). Then I changed it to zaponlak (completely sealed).
3. If there is a tester, you can ring it on the loop. If the resistance is too high or the break is conductive glue , draw it over the tracks (or their remnants).
You can also use a thin enamel wire - but this is cheating.
But I think that the second is just oxidized or worn contact pads. I have them, if I'm not mistaken, they were even dusted with graphite so as not to spark.
You can make conductive glue yourself, for example, from lead and zaponlak (or other glue), but it’s better for repairing glass heaters in auto shops.

Answer 2

Repairing is difficult and not worth it - it's easier to replace the entire keyboard, it will be more wholesome.