HP 595764-001 - Motherboard for HP Elitebook 8540p 8540w | For use only with CPU 520M 540M or 620M Sale $99.00 Retail $149.00
HP 595745-001 - Display enclosure - Includes antennas, microphone, and microphone mylar - For use on the EliteBook 8540w Retail
HP 595765-001 - Intel Quad Core Motherboard for HP Elitebook 8540p 8540w | for use only with 720QM and 820QM Sale $59.00 Retail $69.00