Liquid damage - '11 13" mbp. Screen dimming problem

Discussion in 'MacBook Pro' started by chandleya, Dec 30, 2011.

  1. chandleya macrumors newbie

    Dec 30, 2011
    Got an interesting problem on a liquid-damaged MBP 13". This is the early-2011 i5 model w/ intel gfx.

    The display 'works' - as with most led issues, the panel is still producing graphics, just no light. However, when you first turn the machine on at boot - the LEDs come on, then 'gracefully' dim to zero as if to suggest software is dimming the LEDs, not hardware failure. Any ideas?

    The keyboard and trackpad appear to be destroyed. Works fine via usb, ordering new keyboard and trackpad.
  2. mape2k, Dec 30, 2011
    Last edited: Dec 30, 2011

    mape2k macrumors regular

    Apr 18, 2011
    Maybe the keyboard button to dim down the display is "stuck", thus sending the signal to lower the light of the display?

    edit: Try to disconnect the keyboard and see if the problem persists.
  3. chandleya thread starter macrumors newbie

    Dec 30, 2011
    Unfortunately, the 'dimming' occurs within 2 seconds of the chime. I'm not under the impression that the key presses 'register' at that time for feature adjustments (vol, bright, etc)


    Hard to disconnect keyboard and press power key - they're integrated.
  4. chandleya thread starter macrumors newbie

    Dec 30, 2011
    Disconnected the backlight cable, all better now.

    Perhaps the LED driver for the keyboard backlight is tied to that of the led display? I also cleaned the LVDS connector aggressively. Who knows..

Share This Page