AiO-IdeaCentre-C540-CPU-upgrade-with-Xeon - English Community - LENOVO COMMUNITY
Original Fru 90001476 For Lenovo Ideacentre C540 Aio All In One Laptop Motherboard Cih61s Sr177 Ddr3 Ram Ddr3 100% Tested - Laptop Motherboard - AliExpress
Lenovo C540 LA-9301P alaplap – Empower laptop
Lenovo C5 Series C540 All-in-one hands-on for review - YouTube