This service door is a must-have for anyone with an HP ProBook 4540S laptop. It is a high-quality replacement part that is compatible with HP and is manufactured in China. With its great product type, it is perfect for those looking to repair or upgrade their laptop. The service door is designed for easy installation and removal, and it ensures that your laptop remains in optimal condition. It is categorized under Other Laptop Replacement Parts, Laptop Replacement Parts, Computer Components & Parts, and Computers/Tablets & Networking. This HP ProBook service door, with model number 690978-001, is a reliable option that will help you get the most out of your laptop.