NeweggBusiness - Lenovo Laptop Intel Core 2 Duo T6600 (2.20GHz) 3GB Memory 320GB HDD Intel GMA 4500MHD 15.6" Windows XP Professional preinstalled with Windows 7 Professional Upgrade Option G550(2958-A4U)
4GB DDR3L-1600 (PC3-12800) SODIMM Memory RAM for Lenovo G550
KIWA7 LA-5082P For Lenovo G550 Motherboard With Heatsink+4G RAM +Power Button Switch Board+CPU fit for G555 LA-5972P - AliExpress
NOKOTION KIWA7 LA-5082P For Lenovo G550 Motherboard With Heatsink+4GB RAM +Power Button Switch Board+CPU Fit for G555 LA-5972P - AliExpress