Usb Type C Female To 4.8*1.7mm Charger Laptop Power Adapter Connector Usb-c Converter For Hp Compaq 500 510 520 530 540 550 620 - Buy Connetor,2.54mm,Connector Accessory Product on Alibaba.com
HP 540 Notebook PC | HP® Customer Support
Hewlett Packard HP Jornada 540 Blue Handheld 12 bit Color LCD Screen Pocket PC | eBay