Hello from Ukraine,

I have a 2014 M6600. Currently have two 4GB memory strips installed, and I want to add two more of the same. Bought the same two of 4GB. When I was disassembling the keyboard, I saw a plastic plug installed. Here is the photo https://imgur.com/a/1n4vBgg

I removed the plug, there are two normal slots. Installed two additional same RAM and turn on notebook. It work only few seconds, The display does not show anything, and turned off on its own.

I did not find any restrictions in the BIOS settings. The new memory strips are working, I swapped them (for testing purposes) with the ones that were already installed. They even have the same year of production (via CPU-Z).

Who can tell me what the problem might be? Thanks in advance!