【 Easy and Simple Keyboard FIX 】 Step by Step Guide ▷ 2022

Keyboard errors, although they are not very common, can cause great inconvenience, and these can lead to the keyboard stopping working, in those cases, There are methods that can be applied to solve them.

In many circumstances the keyboard problem is that some keys don’t workand this leads to making certain mistakes and believing that the malfunction is due to a bad configuration in the system.

However, you should know that it is not so, There are failures or damage that occur to this in some components that prevent the keys from working as they should. That is why in this tutorial we are going to explain step by step, how you can diagnose these failures and how you can solve them.

What are the possible reasons why my keyboard no longer works?

There are different causes that generate failures in your keyboard or keyboard, each of them can be generated in different ways, but You should know that there are some methods that can be applied to prevent them from being generated, or failing to get worse the current state of the device.

Among the causes are:

Excess dirt: Dirt such as dust, hair, food residue, or other small solids can damage membranes and even component circuitry.
Humidity: If your devices are in a place with high humidity, it can cause errors in the circuits, creating what is called sulfation, (which is basically oxidation of the electronic components or their circuitry). This process directly interrupts or cuts off the flow of current, preventing the system from working correctly.
Wet the keyboard: In some cases, the incident occurs in which a drink is spilled in them, for example, coffee, tea, water, etc. If there is luck in the first instance, nothing fails, and just letting it dry will solve it. But if it is a repeating event, it will damage the keyboard board.

Solutions or methods to avoid keyboard failures

Just as there are different causes that can damage a keyboard, there are also methods that can be used to help prevent this damage before it becomes critical and you have to perform a repair or in its seriousness change the device, since it cannot be repaired.

Among the solutions are:

Avoid having your equipment in a place with a high concentration of dusteven eat on it, in case you cannot avoid it, Exercising maintenance from time to time will help prevent damage.
Humidity it is a great enemy of electronic components, because it accelerates and causes sulfation. To avoid this, the ideal is to have the electronic elements away from places with high concentrations, or in ventilated places, in order to prevent it from concentrating in the same place. And as in the previous case, the best tool to avoid it is perform preventive maintenance.
In case the keyboard got wet the best thing at that moment is to disconnect it or immediately turn off the device (this in case it happens on a laptop). In the case of being a membrane keyboard, once it is disconnected, proceed to open it carefully until you get the part of the circuit, clean the area and wait until it is completely dry. Once clean, check the state of the circuit and if no damage is observed, close and test it.

How to fix the keys that don’t work on our keyboard?

In the event that it already has faults and it is recognized that they are not due to a fault, all that remains is to repair the circuit. This procedure is highly delicate. This is because if it is done carelessly without correctly following the steps, you can cause totally irreparable damage to your team.

In case you are not sure, it is better to take it to a specialized technician and that he himself make all the necessary repairs.

Repair material and tools

Before starting the repair, there is a list of items that you must have in order to perform this task:

Digital multimeter: This element will allow you to verify the state of electrical continuity of the circuit. Either by measuring its resistance or by measuring electrical continuity.

Blade (stick) screwdriver and slotted (cross) screwdriver: this to be able to remove all the keyboard screws.

Cleaning liquid for electronic components: This liquid is specifically used to clean electrical components, since after use it evaporates completely, which makes it easier to dry. If this is not possible, you can use acetone (nail polish cleaning liquid) or pure alcohol.
Cotton or cloth: This has to be totally clean to use it together with the cleaning liquid.
Electrically conductive paint (Electric Paint): Failing that, a graphite pencil or the lead of a mechanical pencil with a very soft hardness can be used.

A needle and an extra fine brush: this only in case of acquiring the conductive paint.

Procedure and steps to repair a keyboard

The steps to correctly fix a keyboard are easy to execute, even so, you need to be very careful when doing them, this because a mistake will cause irreparable damage.

open the keyboard, for this, use the mentioned screwdrivers to remove each screw in it, then open the case.
Once open, you must remove the keyboard membrane, remove it carefully, once this is done you will see that it is made up of various parts, the one that interests is the one with the printed circuit.

Performs a total cleaning of the membrane with the circuit cleaning liquid or with any of the alternatives and wait for it to be completely dry before performing another task.
Observe the circuit carefully and in detail, in order to discover segments that are damaged, sulphated or with dirt in it.

After observing the damaged parts the continuity of the circuit will be checked using the multimeter and placing it to measure resistance or continuity, both are valid, it is only necessary to place it in some of the nodes.
The measurement will be made from any node (the circles with multiple connections) to the segment that is faulty.

To make sure that the error is there, at the place where the damage of the circuit is seen, the measurement is also made. The multimeter, when it does not present electrical continuity, will show a value of 1 (in case you are measuring resistance) and in case of measuring continuity it will not give any beep or sound.
Now we are going to repair the damaged segment, with conductive paint or graphite. If you’re using paint, use a needle for the circuit lines, as it’s important to keep them as thin as possible. It is important that you do not touch others, this because it will generate a short circuit if they come together. Remember to use little paint.

How to check that the keyboard has been repaired?

For this it is necessary to use the multimeter again, you have to take into account that if you are not an experienced user in electronics, or in the tool you are using, It is best to place it by measuring resistance, “Ohm”.

Thus we will observe which places have better electrical flow, the closer to zero the measured result is at that moment, the better.

Now check the area with the multimeter, you will perform the same tests previously explained. If everything is correct, it should give you a value other than 1, the closer it is to 0, the better the continuity of the circuit. Before carrying out the check, wait for the paint to dry completely.

Now, reset the keyboard membrane. Once you have it ready, check the status by connecting it to your computer. If everything is correct, all keys should work.