Laptop touchscreen feature not working

I have a Lenovo Yoga, which has been a really great laptop so far. It’s really light, and the perfect size for travel-- it’s been to Israel, Costa Rica, and twice to California (which, with the stopovers, were longer trips than Costa Rica). It did three college courses with me. So it’s had a lot of use. It got a ding once (at home), which didn’t seem to hurt it, but it had weeks left on the extended warranty I bought, so I took it in for repair. It was working perfectly afterwards.

A couple of days ago, the touchscreen feature shut off.

I had this happen on another laptop a few years ago, and it turned out that I had somehow switched it off. I got into settings, and turned it back on.

But I have gone everywhere, including the bios, and can’t find a place to turn this on or off. The device manager says its “working properly,” and has the latest driver. I rolled back the driver. Didn’t help. I uninstalled and reinstalled. Didn’t help. I tried recalibrating, but it has to recognize a touch to calibrate. I downloaded and installed all updates. Nope. Tried a restore point. Nope.

I have emailed the manufacturer, and am waiting for a reply, but while I’m waiting, I thought maybe someone out there had encountered this, and had a suggestion.

assuming win-10. No actual way to toggle touch on and off (unless Lenovo have a utility)

Open the device manager, and the section “Human Interface Devices”. You should have one or 2 keys “HID-compliant touch screen”. Check they re all enabled.

They are.

I also went into the bios and reset everything to default.

disable and re-enable the HID devices. Worth a try.

Do you have an external monitor (non-touch) connected? May be confusing it. Reboot with it disconnected. Also reboot with all other external stuff disconnected, (USB etc.), may work.

We do have a Yoga in the house, but not my laptop. But I did see a hint once on a Lenovo forum about odd issues, said to power off and hold the on/off button down for a minute. No idea what this is supposed to do.

None of the above. Not even a mouse. But I will try the power button thing.

Might be a hardware failure? Loose cable? I’ve had a few Yogas and Thinkpads and all have needed repairs/replacements from Lenovo. Might be worth checking to make sure all your display cables are still in place and tight and uncorroded:

Well, the device manager tells me it’s working properly. That seems to suggest a software more than a hardware failure.

Could also be a cable/bad connection issue. I wouldn’t count on Windows device manager for catching that.

It spontaneously decided to start working. Don’t know why.