Touchpad problems

[mke21]

We use this laptop (15-da0636nd) under both Linux (Ubuntu 20.04) and Windows 10. The problem I describe here occurs under both OS's, so I doubt this has anything to do with drivers or other software related problems unless the linux and windows drivers have the same problem.

The touchpad becomes somehow unresponsive after a while, showing random input after that. So it does not totally freeze, but the mouse-pointer jumps all over the screen, sometimes randomly opening and closing windows and sometimes shows random scroll behavior ( the content in a screen slowly creeping upwards). Attaching a mouse seems to work, but touchpad should be turned off as to not interfere with the mouse input.

My question:s

- Could this be a broken touchpad?

- And if yes to above question, can I replace the current one with a new one?

- And if yes, which model of touchpad do I have to buy?

[ub6424 · Accepted solution]

Hello @mke21 

Sorry to hear that you are having problems ... and I would like to help you.

(1) Update BIOS ( using your windows operating system )

HP Notebook System BIOS Update (Intel Processors)

F.41 Rev.A

50.9 MB

May 16, 2022

Download

Why should you install the update ?

https://support.hp.com/us-en/document/ish_4123786-2338478-16

Quote: "

Updating the BIOS is recommended as standard maintenance of the computer. It can also help resolve the following issues:

• An available BIOS update resolves a specific issue or improves computer performance.
• The current BIOS does not support a hardware component or a Windows upgrade.
• HP Support recommends installing a specific BIOS update.

"

(2) Install/Update

HP Consumer Desktop / Notebook PC ME Firmware Update

01 Rev.A

7.7 MB

Jul 24, 2018

Download

(3) Reboot and test again ... ( windows / linux )

(4) If the touchpad still does not work properly:

See: Maintenance and Service Guide

Page 55 Component replacement procedures

HP spare part number	Part Description
L20449-001	TouchPad module
L20450-001	TouchPad module cable

Page 56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts

(5) Please report your results

[mke21]

Thank you, I will try this and report back the results. 
one question, this replacement parts can be ordered directly from HP?

[ub6424]

Hello @mke21 

---

@mke21 wrote:

Thank you, I will try this and report back the results. 
one question, this replacement parts can be ordered directly from HP?

---

yes, use HP Partsurfer:

Url:

https://partsurfer.hp.com/partsurfer?searchtext=L20449-001&searchby=part

[mke21]

Thank you, the updates seem to have worked. I’ve waited for some time to see if the problems came back, but for now they seem to be solved. 

[ub6424]

It was a great pleasure to help you