We can fix white display problem in samsung glaxy note 3 n9005 with simple methods. First check Lcd for damage then check Lcd connector on circuit. Some time this fault creates due to water damage clean circuit with electronics cleaner and apply normal heat to dry. Below in diagram some tricks are given, first check marked points with digital meter or apply jumper if any point missing. Rehot marked ic as shown in diagram below.
Fix White Display Problem in Samsung Galaxy Note 3 SM-N9005 with diagram help troubleshooting