There could be several reasons why some keys on a laptop keyboard are not working:
Hardware issue: One possible reason could be a physical problem with the keyboard itself. The keys may be stuck or damaged, preventing them from registering when pressed.
Software issue: Another possible reason could be a software issue, such as outdated or corrupted keyboard drivers. This can cause certain keys to malfunction or stop working altogether.
User error: It's also possible that the user is accidentally pressing the wrong key or using incorrect typing technique, which can cause certain keys to not work properly.
Dirt or debris: Dirt, dust, or other debris can get lodged under the keys, preventing them from making contact with the sensor underneath.
Spillage: If liquid is spilled on the keyboard, it can cause certain keys to stop working.
To fix the issue, try cleaning the keyboard, restarting the computer, updating keyboard drivers, and checking for any physical damage. If the problem persists, it may be necessary to replace the keyboard or seek professional assistance