Common symptoms
- One key cap is missing or loose.
- The key still works when pressed carefully.
- Several keys do not respond or type wrong characters.
Possible causes
- Broken key cap or hinge mechanism.
- Damaged keyboard membrane.
- Liquid damage under the keyboard.
What diagnosis checks
- Whether the key mechanism can be replaced alone.
- Whether the keyboard still registers input correctly.
- Whether liquid or physical damage affects more keys.
When repair is possible
- A single cap or hinge may be repairable if compatible parts exist.
- Full keyboard replacement may be needed when the membrane or multiple keys are damaged.
What not to do
- Do not glue the key cap down.
- Do not pull neighboring keys for parts.
- Do not keep using the laptop if liquid reached the keyboard.