How do I replace the memory module in my HP t520?

To install or remove a DDR3-SDRAM SODIMM, follow these steps: Remove and disconnect any security devices, media, external devices. Disconnect power and wait 30 seconds before handling the modules. Carefully move the thin client out of stand and lay flat on surface facing up. Follow instructions under Install SODIMM section for insertion or removal procedures while ensuring correct orientation noted by gold notches aligned with memory connector tabs (Page 7, Page 10)