So I bought a second hand HP Zbook 15u G2 Mobile Workstation laptop with 8 GB memory in DIMM1 slot, which works OK.
I am now thinking of adding another 8 GB module to the other (DIMM2) slot but before I buy it, I tried moving the current 8 GB SO-DIMM module from the "DIMM1" slot to "DIMM2" slot to make sure that the second slot is OK. But when I turn on the laptop with the single module in slot "DIMM2" (and "DIMM1" unpopulated), the laptop doesn't boot. Caps lock and num lock lights are flashing, the fan spins at full power and the screen remains blank.
Is it possible that this is just "by design" and that a single memory module MUST be installed in DIMM1 slot ? I cannot find any confirmation on this in any HP manual.
It's probably just a limitation and not a defective DIMM2 slot, but I'm not sure and wanted to ask first. Thanks for clarification.
But unless someone has your exact model notebook and has done what you did and reports the notebook produces the same error, then I doubt you will find the answer to your question until you actually install a second memory chip in that slot.
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