it-solve
Member
A beer damage board turns on with no backlight. Tried SMC reset, capslock is active and there is USB activity
The backlight blinks for a second once when turns on.
D7701 - 8.6v both sides
XW7720 - 8.6v and clean
BKL_EN - 2.83v
BKL_PWM - 0v
All Return resistors 0.6Vdc
Removed R7704 and tied together BKL_EN and BKL_PWM and backlight stays on.
With the jumper, PPHV_S0SW_LCDBKLT is 24.4V
Does not seems to be U7701, BKL_PWM comes from SMC, reflow?
The backlight blinks for a second once when turns on.
D7701 - 8.6v both sides
XW7720 - 8.6v and clean
BKL_EN - 2.83v
BKL_PWM - 0v
All Return resistors 0.6Vdc
Removed R7704 and tied together BKL_EN and BKL_PWM and backlight stays on.
With the jumper, PPHV_S0SW_LCDBKLT is 24.4V
Does not seems to be U7701, BKL_PWM comes from SMC, reflow?
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