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LG G2 is not turning on when tapping on screen

Discussion in 'Android Devices' started by ColtonS, Jun 9, 2014.

  1. ColtonS

    ColtonS Lurker
    Thread Starter

    All of a sudden, my G2 is not turning on when I try double tapping the screen. I have to use the back button, which is not a problem, but am not used to it. Anybody know of any solutions to this annoying problem?


  2. brianrudy

    brianrudy Newbie

    Check in the gestures settings under the general tab to make sure that screen on/off is checked.
  3. Ravenbrook

    Ravenbrook Member

    My phone did that too. Then all hell broke loose and it started to flip out. I've read it's the digitizer going crazy. Happened to both mine and my girlfriends G2. Had to have them replaced under warranty.
  4. grunt0300

    grunt0300 Android Enthusiast

    There's a new upgrade that came out today, and it's all for the "knock on/knock off" feature. Go to settings>display>lockscreen>select screen lock. Tap on the last one, and it should have a selection for knock code. Select that one and follow the directions. It works perfectly. If you haven't gotten the upgrade, you will very shortly. Good luck.:p
  5. bberryhill0

    bberryhill0 Android Expert

    Today's update is just on one carrier.
  6. hollywoods14

    hollywoods14 Android Expert

    im having the same problem, no knock on. Knock off works fine. I have also noticed that the upper parts of the digitizer doesn't like to respond in certain apps. Mainly Play store, when i have app updates it doesn't respond to touching the update button. I have to rotate the phone for ti to function. Also the gallery app opening the top row of folder and top row of pictures take a couple very solid taps to open. Could this be something in the Kitkat update? Everything was fine before i updated a week or so ago. I just noticed the issue a couple days ago. I did a clean update with a fdr.

    Edit: Best i can tell if you're not verizon a touch firmware update should fix your issue. If you are verizon, warranty replacement is going to be the best option. Sounds like the dead spot issue is hardware/ digitizer related.
  7. stef7

    stef7 Android Expert

    Hollywood, you posted something interesting in the VZW forums. I tried to reply but couldn't this morning.

    I think you are correct about the dead-spot being hardware related, and so, what is the different thing about the VZW model?

    Curious... have you been charging the phone wireless with a Q-compatible wireless pad?

    I wonder if heat or the magnetic field flux is causing the digitizer to fail when someone uses a wireless charger.

    It's also possible, the VZW digitizer/screens were lotted from another source and prone to fail.
  8. hollywoods14

    hollywoods14 Android Expert

    I do not use wireless charging. However I do think the lcd/ digitzer assembly is different for the vzw variant. When you look for a replacement it always notes for or not for vzw. I just wonder if something in the update caused excessive heat or something leading the hardware failure in the screen. The dead spot issues definitely seems Verizon specific. I wonder if maybe its batch relate, kind of how some of the common issues with the Spectrum seemed to be.
  9. BRIAN5337

    BRIAN5337 Android Enthusiast

    There maybe an issue with Proximity*sensor causing knock sensor not to activate.

    The case or screen protector could be blocking proximity sensor.
  10. hollywoods14

    hollywoods14 Android Expert

    No dice, one of the first things tried. Definitely something internal.
  11. BRAINZ2013

    BRAINZ2013 Extreme Android User

    That's a warranty issue or a update you need to fix this . check to see if device is up to date . do this with the lg web site.
  12. BRAINZ2013

    BRAINZ2013 Extreme Android User

    Who is your carrier . some software issues caused this glitch try this to update I hope your not rooted if so this will put the stock and unroot your device.
  13. hollywoods14

    hollywoods14 Android Expert

    Verizon, got it replaced.
  14. stef7

    stef7 Android Expert

    It's possible the unit running at high internal temps is causing the LCD to fail. Or like we've been discussing, the batch of screens for the VZW model have a higher mortality rate than others.
  15. hollywoods14

    hollywoods14 Android Expert

    Who knows. They sent me a refurb though, however the damn things seems to work very well. Knock on is way more responsive than it ever was on the original.
  16. BRAINZ2013

    BRAINZ2013 Extreme Android User

    I think the batch of bad digitalizers was the problem they are just giving out refurbished cause they know and they fixing the problem fast and best they can
  17. BRIAN5337

    BRIAN5337 Android Enthusiast

  18. creator69

    creator69 Well-Known Member

    I think in my case I need to get a replacement. I think the Digitizer is going bad. The Knock on quit working and when you try to swipe down when screen is on it doesn't always grab. This is the second time I've had to replace a phone for a bad digitzer.
  19. hollywoods14

    hollywoods14 Android Expert

    Mine was ding the same thing. If you open the notebook app and draw vertical lines, you will the dead area across the screen where touches do not register.
  20. creator69

    creator69 Well-Known Member

    I've done that and the top of the screen is going bad, I get no response. It sucks that it is the second one with the same issue.
  21. hollywoods14

    hollywoods14 Android Expert

    sounds like another warranty replacement, that sucks being the second one. Mine goes out again, you better bet I'm lobbying for another phone.
  22. creator69

    creator69 Well-Known Member

    Nice thing for me I'm on the edge plan so I can switch devices in Nov.
  23. hollywoods14

    hollywoods14 Android Expert

    Im due for upgrade myself, but i wouldn't waste that replacing a defect device that's under warranty. Also the whole I'm still on unlimited data thing too, lol.
  24. creator69

    creator69 Well-Known Member

    I'm off unlimited data, but I only pay 2/month for edge plan. Since if your on a 10gb plan or higher if your on edge or your phone is paid off you get a 25 per line credit.


The LG G2 has a 5.2-inch display with 1080p resolution. It also has a Qualcomm Snapdragon 800 processor, 2GB of RAM, a 13 megapixel camera, NFC, and more.

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