I have a T150 that has been running "32GB (1X32GB) DDR4 3200MHZ PC4-25600 2Rx8 1.2V 288-PIN ECC Unbuffered UDIMM" in the A1 Slot for the last 8 months. I went to finish upgrading the memory to the max capability of 128 GB using dual-rank memory. After installing all four memory slots, it gets stuck in "Loading Bios Drivers." After extensive troubleshooting, moving modules around, and even checking each stick by itself in A1, I found it boots fine. The only combination that works is 32 GB memory sticks in A1, A3, and A4 with a total of 96GB of memory. If I put a stick in A2 the server does not boot.

Is the A2 slot bad? Thoughts?