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• Laptop Scrolls Down Automatically

Been using rarely my Lenovo G560 laptop and after long time of not using it I have noticed that touchpad stops responding after short while. Incidentally while trying to find the cause, after pointing on taskbar I've noticed swift tabbing in right direction between taskbar icons appearing as some key was stuck which is the case I reckon because when problem reappears and I press on directional right key, the scrolling stops for short period but then resumes. The bad thing is that it also happens in BIOS, not to mention Windows 7 boot screen and scrolls down, which leads me to believe something is faulty in keyboard keys or keyboard itseld because no key is stuck-pressed.

Reporting: Uncontrollable scrolling on windows 10 This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community. Sounds odd, does the computer scroll up and down literally on its own with no help what so ever from you? Cause if this were the case i'd say maybe a problem with the keyboard. But to go both up and down, on it's own Id think the stuck actions would cancel each other out unless they were just randomly firing. Did ya try changing the keyboard?

See this video of scrolling in Start menu:

This laptop hasn't been used for over a year and I did not drop it. Should I take keyboard off and clean contacts? How to solve this?

Laptop Scrolls Down Automatically

4 Answers

It sounds like keys are 'sticking down'. Though in fact they don't really 'stick down', but rather the electrical signals get a bit haywire. More likely if you've ever spilled anything on the KB, but can happen without, especially if the unit is rarely used.

If it's simply a matter of rare use then it's fairly likely that 'exercising' the keyboard for a few minutes -- just punching all the keys repeatedly -- will improve the situation, and maybe cure it, at least temporarily.

Added: Keep in mind that most laptop keyboards consist of a rubber membrane over a printed circuit. Pressing a key presses the membrane against the printed circuit, and the conductive rubber of the membrane thus 'completes' a circuit, allowing the key press to be detected. (In some cases the detection is capacitive rather than resistive, but the principle is the same.)

A big advantage to this scheme is that it's hard for the innards to get dirty (though spilling liquid on the keyboard can do it).

Seems like a defective keyboard with a stuck key/keys.

because no key is stuck-pressed

Just because the physical key is not pressed in does not mean the key mechanism isn't faulty and stuck.

It is possible that the contacts are corroded or that a foreign body (insect?) is shorting the contacts. Best way to clean keyboards (in my opinion) is by using a vacuum cleaner, which can suck out particles between keys. If you don't have that then instead blow air into it using a pressured air can. This may however send the foreign body deeper into the computer.

If you still have one, claim it on warranty. I've had many laptop keyboards replaced, free of charge, over the years.

If it takes more than (carefully administered) soapy water and a soft cloth to get rid of dirt or grime, you'll get a better result from a replacement keyboard.

@Daniel has probably given you the most accurate answer you're going to receive on a stuck key issue. Normally there would be a lot of software issues to check first, but since you said this also happens in BIOS, it's not the case.

Given the thin cable connecting the keyboard to the mobo and the length of time you said it sat for, component creep (ribbon) is a possibility, but highly rare.

The only possible options you have left are:

You can follow this video guide to remove the keyboard if you're unsure.

If none of the things mentioned so far work, then get a new keyboard, because there is nothing left for you to try.

Not the answer you're looking for? Browse other questions tagged keyboardbios or ask your own question.

Comments

• Can you give an example of the Windows 10 applications? My start menu works fine.
  Are you using a laptop or desktop?

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• @DeKay desktop!
  It happens when I use my wireless mouse to click inside the start menu. It scrolls down on any page in windows settings. It's super annoying. And any drop down menu online it scrolls right to the bottom.

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• I think someone on this forum had this same problem but I can't remember how they fixed it if they even did.
  Have you tried with a different mouse?
  Or maybe do a system restore before the problem started?

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• @DeKay yup tried a different mouse, still have the problem.
  Haven't done a system restore.. does that remove files like documents, or saves?

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• edited January 2018

  Google says it could be a USB port problem, an Xbox controller problem or a mouse problem.
  System restore doesn't remove your personal files but if you have installed a new program after the restore point (let's say the restore point you picked is in December but you have installed a new program in January), you will have to reinstall it again. Just be sure it's system restore and not system reset.
  http://home.bt.com/tech-gadgets/computing/windows-10/how-to-fix-windows-10-problems-with-system-restore-11364008291943

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• So if I just installed a virus protection software today, for example, I have to reinstall that? How do I even know when my restore point is? I'm so nervous to do it.

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• edited January 2018

  So if I just installed a virus protection software today, for example, I have to reinstall that? How do I even know when my restore point is? I'm so nervous to do it.

  
  Yes.
  They would put a date on that restore point.
  Oh, also if you have just installed the Laundry Stuff Pack, you would have install it again, but maybe the whole game. I had this problem before and the game didn't recognize the pack being installed and gave some error that it can't open the pack. So I had to reinstall all the packs.

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• So if I just installed a virus protection software today, for example, I have to reinstall that? How do I even know when my restore point is? I'm so nervous to do it.

  
  Yes.
  They would put a date on that restore point.
  Oh, also if you have just installed the Laundry Stuff Pack, you would have install it again, but maybe the whole game. I had this problem before and the game didn't recognize the pack being installed and gave some error that it can't open the pack. So I had to reinstall all the packs.

  
  @DeKay so I just did a system restore and the problem is still there. Awe man. I'm thinking more and more that it's a virus or something.

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• Aw, I'm sorry. Maybe you can try a system file check? https://www.windowscentral.com/how-use-sfc-command-utility-fix-system-files-windows-10
  Or install Malwarebytes.

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• @DeKay will that tell me if I have something on here I shouldn't?

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• @DeKay will that tell me if I have something on here I shouldn't?

  
  Yes, for both.
  I think the system scan will take care of it automatically and the Malwarebytes will put them in quarantine.

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• @DeKay will that tell me if I have something on here I shouldn't?

  
  Yes, for both.
  I think the system scan will take care of it automatically and the Malwarebytes will put them in quarantine.

  
  Ok, thank so much. I'll try this out. Thanks for your help!

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• No problem. I hope you'll solve the problem soon.

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• edited January 2018

  Hey @DeKay so good news - I got it back!! But they couldn't identify the problem, and it just went away itself. Sooo bizarre. Ah well. Back to my life of simming! Hahaha.

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• My origin ID: DeKaythePUNK