In 2015 I replaced RAM with 2 X 8 GBKIT DUAL CHANNEL SO-DIMM DDR3 PC12800 (CT2C8G3S160BMCEU).
Works fine, but since, each time my MBP goes in “standby” mode (when unpluged or closed) this one doesn’t not awake, need to turn it off (by holding off button for a few seconds) and restart it !
I also test my RAM (memtest, plus alternativly test one by one 8GB + hibernate / standby-> awaking is OK)
Since i also upgrade HDD with a SSD and problem is not solved. I tried several things I found from some people who encountered the same issue, but my “standby mode" problem is still there in 2019. (In fact it seems I was not able to change the hibernate image size, this one is always 8GB).
My MBP is running under macOS Mojave (10.14), I also encountered with other versions of macOS from the first that was installed (Yosemite)
Does some one here found a solution ?