Why do you need Keyboard Test?
Usually, people need to use the keyboard test after they found a keyboard malfunction to determine what exactly isn't working. It is also needed after repairs to make sure all keys are working properly.
Let's look at a few popular keyboard malfunctions that can be verified with this test:
Liquid spilled onto the keyboard
First you need to disassemble the keyboard and dry it. If it is membrane, then it is important to dry the moisture between the sheets of the membrane. After assembly, you need to check all the keys with the Keyboard Test.
If some button is not working or the wrong one is lighted instead, then the liquid may not be completely removed, or the contact track is damaged and must be restored.
One or more buttons just suddenly stopped working.
There may be dust or some crumbs in the membrane under the button. If it is clean there, the second reason may be contact destruction due to wear.
When one button is pressed, another or several others are triggered.
There are several reasons for this behavior:
- Moisture has got on the contacts. It is necessary to disassemble and dry the membrane.
- After the keyboard was reassembled, the membrane sheets were laid unevenly, which is why the wrong signal is transmitted to the board. You need to reassemble the keyboard correctly.
- The buttons may be swapped.
In all cases, our keyboard test will help you compare the pressed button with the result on the screen.
I pulled out buttons and can't remember where they were!
Everything is simple here. Press the button on your keyboard (with a pen or with a not sharp pencil), see which one lit up on the screen and put it in place.