service bulletin ASC20060303001 dated 03/03/2006 for HPR4252 and HPR5052.
Subject: change of connectors between Y-Main and Bullfer.
The connectors between the Y-Main Board and the Y-Buffer boards have been changed during November 2005 production to reduce loose connection problem
Det verkar vara just det problemet du beskriver, nedre halvan av skärmen blir svart.
http://www.fixya.com/support/t243698...ack_samsung_hp