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

[chandleya]

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.

 

[mape2k]

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.

 

[chandleya]

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.

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)

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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.

Hard to disconnect keyboard and press power key - they're integrated.

 

[chandleya]

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..