T430 second RAM slot not working

What is RAM ? ram slot 2 not working I discovered that RAM Slot A2 does not work Both RAM Sticks work as I tested both of them in SLOT B2 So, at the moment I am only using one ramesses book slot demo RAM SLOT NOT WORKING Both RAM SLOT NOT WORKING PROBLEM SOLVE, FULL RAW

ramai123 slot For best performance, fill both memory slots, installing an equal memory module in each slot DIMM in one slot and a 1GB SO-DIMM in the other 4 GB