Slight red light?Support


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  1. Rxpert83

    Rxpert83 Dr. Feelgood Moderator

    So I've noticed the past 2 nights that my LTEVO has a red LED light that's just barely visible (only in dark room) on the left side by where the lighting sensor is. It doesn't go off until I restart the device and I don't notice it again till the next night.

    Any clue what this is or why it is on? :confused:

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  2. EarlyMon

    EarlyMon The PearlyMon Moderator

    Is your proximity sensor getting wonky?

    Or, is it under the grill?

    The Evo had a hidden LED as an Easter egg...
    Rxpert83 and marctronixx like this.
  3. marctronixx

    marctronixx Moderator Moderator

    its probably the proximity sensor or the light sensor. its not an LED...
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  4. Rxpert83

    Rxpert83 Dr. Feelgood Moderator

    You guys are correct its not an LED (wrong terminology :eek:), but there is a red light showing up at the top left of the screen where those sensors are.

    It stays on until I reboot the phone and then seems to come on randomly at some point in the day because I dont notice it again until the next night when the light in the room is dim enough to view it.
    marctronixx likes this.
  5. EarlyMon

    EarlyMon The PearlyMon Moderator

    Grab Elixir 2, it's free, choose Sensors, button in the middle.

    Click the triangle (play) on the proximity sensor test, that will light up that sensor as a very, very dim red. Click the box (stop) on the test and it ought to go dark.

    Let us know what you get.

    Wonder what you're running that's on about that sensor?
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  6. ren857

    ren857 Well-Known Member

    That has happened to me to. But my proximity sensor had been acting wonky. The light did appear to come from that sensor.

    I rebooted a couple of times and after a day or so, it seemed to fix itself. I haven't seen that light.
    marctronixx, EarlyMon and Rxpert83 like this.
  7. Rxpert83

    Rxpert83 Dr. Feelgood Moderator

    Yes, that light is the proximity sensor then. Strange. It did go on when I started the test and stopped at the end.
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  8. EarlyMon

    EarlyMon The PearlyMon Moderator

    For now, you can use that to turn it off instead of a reboot.

    I don't know the names of the apps, I think that you do (if true, please mention one here for me), but I understand that there are apps that do a deeper analysis of what is using your battery. Maybe you can use one of those to correlate what app is active or over active when the trouble appears.

    PS - maybe time to try 10 second hold on the power button (same as battery pull for those unfamiliar).
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  9. Rxpert83

    Rxpert83 Dr. Feelgood Moderator

    I have betterbatterystats purchased that I can install, but I use that for checking partial wakelocks. I'm not sure if that would be helpful for this but its worth a shot.
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  10. 3vodroid

    3vodroid Well-Known Member

    Its definetly the prox sensor mine was acting weird when I first installed a zagg shield and I could see the faint light when the sensor was in use.. My thrive does the same thing
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  11. Rxpert83

    Rxpert83 Dr. Feelgood Moderator

    Interesting. I have a zagg installed as well.

    I flashed MEANrom today and haven't noticed the light on yet, but its been less than a day so who knows
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  12. HouseFan13

    HouseFan13 Active Member

    I had this issue recently, and I found a fix for it on a different site. If you have any VoIP apps such as Viber, just go to the app and sign out of it. I did just that and the red sensor turned off :)
    PyroSporker likes this.
  13. rgborj

    rgborj New Member

    My HTC One X shows this dim red light on the left side of the htc, this is after I have installed some apps. The HTC guy told me that, probably because of an app installed. After hard reset, the dim red light gone. :) But all my data was deleted :( But I got back up.
  14. novox77

    novox77 Leeeroy Jennnkinnns! VIP Member

    Proximity sensors typically use infrared. There's two main components: the IR light source (an LED), and a sensor that measure how much of the IR light is bounced back. The human eye can't see IR light, but depending on the wavelength used, there could be SOME portion of the light that barely falls within human vision on the red end. That could account for the faint red glow.

    What this would imply is that the proximity sensor is on when you see the red glow. If it's frequently on and you're not in a call or using an app that requires the proximity sensor, then something is messed up.
  15. 3vodroid

    3vodroid Well-Known Member

    The only time I saw this was when I put my zagg shield on and it was messing with the proximity sensor. I would have the phone away from my face and the screen would still be black with that faint red light. Now my prox sensor is working fine, and I'm always trying to see the light and i never can. Even if trick it with my finger I still don't see it. Pretty interesting.

    I know exactly what you mean novox about the ir sensor. If i record a video of my Toshiba thrive with my evo I see a flashing blue light. But you can't see it with the naked eye. In the case of this red light I could see it easily.
  16. Rxpert83

    Rxpert83 Dr. Feelgood Moderator

    Cutting a notch in my screen protector fixed my prox issues as well
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  17. Maricalinn

    Maricalinn New Member

    Sorry if I sound dumb but idk what a proximity sensor is, anywho,

    I have my normal notification lights/LED on the right, and lately I've been seeing this red light on the left under the grill. this is my second EVO Shift as the first one's touch screen died on me. I had never seen this light with the first phone tho. I initially got paranoid the the govt was watching me (lol) :bath:
  18. 3vodroid

    3vodroid Well-Known Member


    The proxitimiy sensor is a sensor that detects if your face is up against the phone. Which is how your screen knows to turn off when you put your phone up against your face when making a call. Thanks

    Do you see the light only when the screen is off?
  19. BOO5TED

    BOO5TED Well-Known Member

    A proximity sensor is a sensor that will turn off the screen when something comes in very close proximity to it. Such as when you make a phone call, your face is against the sensor thus turning the screen off so your cheek doesn't press
    any buttons.

    Did you notice this is the Evo LTE forum? Your phone, (evo shift) as you say, is totally different than the Evo LTE. We only have the green/amber led under the grille on the right side.
  20. kajun

    kajun New Member

    I had the red light at the top left of my screen on my Z740 Android Radiant and i went into settings under (display) and unchecked (pulse notification light) and now i have a green light. I hate red lights, green means go :D
  21. EarlyMon

    EarlyMon The PearlyMon Moderator

    Welcome to the forums! :)

    Our phone has a different set up from yours, but, glad you got it sorted!
    marctronixx likes this.

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