The keyboard less sensitive and need to click harder to react

It sounds like you're dealing with a keyboard that’s becoming less responsive, which can be frustrating. Since you've already cleaned the dust and debris, there might be a few other reasons why you're experiencing this issue with your Dell Latitude 7490.

Here are some potential causes:

1. Worn-out Key Mechanism: Over time, the mechanical parts beneath the keys can wear down, causing them to become less responsive. This can happen especially if keys are frequently pressed harder than usual.
2. Dirt or Residue in the Key Mechanism: Even though you’ve cleaned the dust, there might still be some residue or oils from your fingers stuck under the keys, which can cause them to become sticky or unresponsive.
3. Keyboard Connection Issue: Sometimes, the keyboard’s internal connection to the motherboard can become loose or faulty, leading to intermittent response or requiring harder presses to register.
4. Software or Driver Issues: A driver conflict or outdated software might be causing the keyboard to behave erratically, which could explain the need for multiple clicks.

If the issue persists despite cleaning, I’d recommend trying a couple of things:

• Update your Keyboard Drivers: Sometimes, updating your drivers can help fix software-related issues.
• External Keyboard Test: Try using an external keyboard to see if the issue is with the laptop’s hardware or something related to the system software.
• Keyboard Replacement: If the issue is hardware-related and the laptop is still under warranty, you might want to contact Dell support. If it’s out of warranty, a local repair service might be able to replace the keyboard.

Speaking of local repairs, Smart Services could be a good option. They specialize in Dell laptop repairs and can help with keyboard issues like yours, whether it’s cleaning the mechanism or replacing the keyboard entirely. They offer affordable services, and I’ve had a great experience with them myself.

Hope that helps, and best of luck getting it sorted!