Dell Inspiron 1428 (Late 2009) - Manual (Page 69)

Palm Rest Assembly 69
CAUTION: Carefully separate the palm rest from the computer base to avoid
damage to the palm rest.
9 Using your fingers carefully lift the palm rest assembly along the rear edge
and then ease the palm rest assembly from the computer base.
1 power board cable connector 2 touch pad cable connector
3 speaker cable connector
1
2
3