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Yoga 720 Phantom Keylock

2018-02-18, 1:32 AM

I've had problems with my Yoga since I got it in November. :(  The issue is that shift/ctrl/win/alt keys are LOCKED randomly and can only be turned off by rebooting.  At first, I thought I had sticky keys turned on and turned off EVERYTHING related to them.  I just spent an hour rebooting my laptop repeatedly and other things trying to get the win key to TURN OFF.  While I'm typing, it would suddenly pop up various windows and wouldn't let me type the letter h. It's extremely frustrating and the closest commentaries I've found online with anything similar stated that it was a hardware malfunction that someone else had to send theirs in to be fixed (a different lenovo machine).  I use this machine for work and am trying to avoid losing it while it's fixed.  Any fixes I may be missing? 


Note: I can tell what's locked when I hover the stylus and it has a little box that pops up that says WIN or something else showing that it's on.


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Re: Yoga 720 Phantom Keylock

2018-02-21, 9:59 AM

Hello TiffanyR

Thanks for using the Lenovo forums.

Unfortunately not come across this before, but here a few things you can try and do:


Try a static discharge for this, it may help to resolve the issue or at least get rid of any built up static on the motherboard.

(If the battery is internal, please just skip the remove/replace battery steps.)
1. Turn the unit off
2. Remove the battery and the Mains adapter
3. Press and hold the front power button for 30 seconds
4. Replace the battery and the Mains adapter
5. Turn the unit on as normal



Try running an LSC scan, see if this is able to find anything for you at all:


1. Please click on the following link
2. Under the section ‘Download’ select the relevant Hyperlink dependant on whether your Lenovo is running Windows 7/8/8.1 32 bit or 64 bit.(Will work on Win10)
3. When prompted, select save and browse to a drive and directory in which to save the downloaded files.
4. Navigate to the folder where you saved the installation file, lscsetup_x86_26001.exe.
5. Double-click the installation file icon to start the installation.
6. Follow the onscreen instructions via the installation wizard that will install Lenovo Solution Centre on your system.
7. Once installed you will have a ‘Lenovo Solution Centre’ icon on your desktop please click to open this.
8. Once solution center is opened please select ‘Checkup’ then ‘Hardware Scan’ and ‘Full Scan’
9. This will take up to 20 minutes, see if this can find any errors.


You could also run a virus scan and see if that is able to find discrepancies around your computer.



Make sure that your chipset drivers and others are up to date, you can find drivers on the support page:





If none of these help, your last resort step should be a factory reset, this will rule out any software issue, if the issue persists after this, then it will be a hardware fault indeed I`m afraid.


Note: Please back up all your data as running this reset will delete any data on your machine

1. Turn the machine off and press the recovery button which is located usually next to the power button. If you have a desktop machine you will need to power the machine back on and keep tapping the F2 key.
2. Use the arrow keys and press enter on system recovery. ( Desktop users can skip this)
3. Select “restore from the initial backup” and then “Next”.
4. Click “start” and accept the warning messages.
Length of time can vary depending on the speed of the machine.


Hope this helps, let us know how you get on.

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Re: Yoga 720 Phantom Keylock

2019-12-21, 18:54 PM

Sorry, but that doesn't answer the question. I have exact same issue on Lenovo Yoga 510 and I use Linux.


You can start arguing that you don't support Linux, but you must accept the fact - it happens on different models and different OSs, so it's not about the drivers, OS, or any other software issue. It's all about the hardware


More over, it looks like some locking "feature" and it has something to do with Fn and Win key.


To reproduce: press Fn key and shortly after press Win key which is right next to it. May be repeat several times. Eventually Win key will be locked and for example pressing D will show the desktop (will behave like Win+D).


Why is it not static electicity or some other environmental issue? Becuase randomly pressing Fn and Win key again many times, unlocks the Win key again. And then you can immediately lock it again.


So, please, provide us with some better suggestion than static electricity or factory reset of the laptop or reinstalling the drivers. It's obviously something about the hardware keyboard controller - either a bug or a "feature"

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