Board got liquid damage and there is no trackpad/keyboard.
Tested with good known keyboard/trackpad and trackpad flex.
Board booting fine.
PPVIN_S4_TPAD is missing (no short to ground)
If I understand correct power line for TPAD is created from PPBUS_X239_REG.
Q7979 Measurements with keyboard/trackpad connected
pins 1,2,3 @ 10.95V
pin 4 @ 11.25V
pin 5 @ 0.002V
Resistance on PPBUS_X239_REG, 74.4K, Diode mode 0.505V
Any idea?
Tested with good known keyboard/trackpad and trackpad flex.
Board booting fine.
PPVIN_S4_TPAD is missing (no short to ground)
If I understand correct power line for TPAD is created from PPBUS_X239_REG.
Q7979 Measurements with keyboard/trackpad connected
pins 1,2,3 @ 10.95V
pin 4 @ 11.25V
pin 5 @ 0.002V
Resistance on PPBUS_X239_REG, 74.4K, Diode mode 0.505V
Any idea?