Btw, I am on a 2014 intel i7 clevo gaming lap (you may have bought it under a different brand) with 3x8gb max. Your model seems to have been aimed at the bottom end, in probably a smaller case, since the Pentium N3540 is the successor of the intel atom series of low power ‘office’ cpu.
On the other hand, try to put a second module in the empty slot, I’ve never seen the max ram being allowed to sit in a single slot, I would rather think if one 8gb works in slot one than 2x8 will work. That would also match my 8gb max/slot of my 2014 clevo. But maybe there’s only one slot, have you had it open?
No I’ve never checked. I live in a Bus (Motor Home), There isn’t much room for taking things apart.
Yeah it’s a Clevo, though. There’s a company in Sydney Australia, that builds them under the Pioneer DreamBook brand. You can get them with No OS, Ubuntu, or for an extra $186.00, Windows Home Edition, about $200.00 for Windows Pro.Edition.
Clevos are made to be user accessible, they also used to keep their warranty when this was done. The memory should be under a flap at the bottom. Looks like this on mine, memory on the left, drive under separate flap on the right. 2 slots, one occupied by 1x8GB:
