I recently bought an HP ProBook 4540S. The touchpad works smoothly on the left side. At the right side, scrolling works, but tapping won't.
Is this a software or hardware problem?
I finally found that the Synaptics touchpad setup was not compatible with HP 4540S and I tried for setup with HP drivers from the Internet. Now it works properly. It wasn't a hardware issue after all.
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site.
Would you like to answer one of these unanswered questions instead?