1. AC Question's Avatar
    Hi All,
    I friend had given me their VS980 that had a broken digitizer glass, the top area to be specific.

    After replacing the LCD assembly, everything worked great, except for one thing: it does not stay powered on in low light conditions.

    If I press the power button on the back or double tap the screen, in normal room lighting or daylight, it's fine. (the display stay on and works as expected)
    If I turn off the lights and its dark in the room, the LCD is powers on for maybe 1/2 to 3/4 of a second and then turns off. this behavior is very consistent.

    Likewise, when I turn the room lights back on and place my finger over the ambient light sensor, the LCD does not stay on when I press the power button or use KnockOn.

    I disassembled the phone again in search of anything abnormal but nothing stuck out at me.
    I am unsure if this was a pre-existing problem when the phone was given to me or if there is another problem, perhaps caused by me.
    Hindsight is 20/20, next time I have to check all functionality before I dig into it.

    NOTE: After I successfully replaced LCD/Digitizer assembly, I did a factory reset. Also the indicators show no signs of water damage.

    I'm wondering if I should replace the ambient sensor, or is it possible it could be a problem with the upper main board or even a software issue?

    Thanks in advance
    02-16-2015 10:12 AM
  2. Rukbat's Avatar
    It could be any of them. If the automatic brightness is on, and its bottom setting is too low, the LEDs will be off instead of very dim (there's a certain minimum dimness they can get to before being off). That could be bad hardware (sensor, motherboard), bad firmware ... a lot of possibilities.

    Turn off automatic brightness.

    Try running Velis Auto Brightness, so you can set the brightness floor.
    02-16-2015 09:04 PM

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