Hac CPU 01 - no backlight - backlight turns on for a splitt second after removing from dock

whatsup guys,

this switch has no backlight. the backlight turns on for a split second after removing it from the docking station. the display is fine. one pad, circled red, on the u2 backlight ic seems to be openline when messured in diode mode. every other value is fitting. how likly is it that the u2 ic is faulty. or could it be something else. prior to this the usb port and m92t36 was replaced.

best regards
backlight