Lenovo Z51-70 80K6 disassembly keyboard , cooler fan clean, wymiana, jak rozłożyć - YouTube
Can I replace my Lenovo Z51-70 CPU? It's an i7-5500U which is very bad at multitasking. Can I replace the processor or the motherboard with a higher processor? - Quora
Solved! - LENOVO Z51-70 replacing DVD/CD drive with SSD with caddy not recognised by BIOS | Tom's Guide Forum
2nd Hard Drive HDD SSD Caddy For Lenovo IdeaPad G70-80 Z70-80 Z50-70 Z51-70 - Newegg.com