Screenpad not working (only screen works) - UX535LI

[ExAstris]

System: Windows 10 / Kubuntu 23.04
Battery or AC: Both
Model: UX535LI
Frequency of occurrence: Constant
Reset OS: - - - (multiple OS affected)

Hello,
the screenpad on my UX535LI currently acts only as a second screen, but has lost the ScreenXpert capability and the touchpad function.

This problem occurs on both Windows and Linux, and on both OS the Screenpad can be used as a second screen (i.e. I can shift windows onto the screenpad and move the cursor there, and everything is displayed correctly), but it does not work as a touchpad anymore. The device also does not appear as an input device in the device manager on Windows or as a touchpad in the system settings on Linux.

I have checked that the most up-to-date version of all drivers is installed (on both OS), as is the current version of the BIOS. The ScreenPad2Optimizer program returns an error code of 0x00000010 and does not solve the problem, and the ScreenXpert program shows an error message that the ScreenPadService cannot be found when I attempt to start it.

As two independent OS are affected, I suspect that this might be a hardware issue, so my questions:

• Is this problem known, and has it software origin, or is it indeed a hardware problem?
• If it is the hardware, what is the most likely culprit? The screenpad itself (although it is functional as a screen)? A cable? The ScreenPad control card? (my laptop is out of warranty, and I'm toying with the idea of trying to fix it myself, but that only really works if I know where the problem is located and which replacements to look for)

Any input would be appreciated!

[ExAstris]

Quick follow up due to the recent activity in this thread:

For me it was indeed a hardware failure, either the the screenpad control circuit board or one of the connecting cables was broken. I reasoned that since the screen still worked the problem was likelly not with the screen itself, but the control unit that is responsible for handling the input and output data for the touchpad and the interactive aspects. So I ordered a replacement from a third party seller, and installed it myself (for good measure I also replaced some of the cables as mentioned since they weren't expensive, but the general pattern of the problem makes me think it was the control unit). The part numbers in my case were 90NB0RW0-R10030 for the control board, and 08201-03011020 and 08201-03001000 for the cables. These may of course be model-specific.

Exchanging the board wasn't too difficult, torx and Phillips head screw drivers are required, and there are disassembly videos on Youtube for the UX535 where I could find out what the interior looks like and what I needed to do.

[ZenBot]

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