Mac Mini Server 2010 Ram issue

Hi,

Im having issues to upgrade my RAM, and reading this post Re: mac mini mid 2010 update fail I found out that other Mac Mini users get similar issues. @Macjack suggested to use Etrecheck to find out if I have any issues, but my lack of knowledge doesn't help, as Im not sure how to fix this issue.

Mac mini (Mid 2010)Mac mini Model: Macmini4,12.66 GHz Intel Core 2 Duo (Duo) CPU: 2-core
macOS High Sierra 10.13.6 (17G65)

I´ve upgradeed the Ram to have 16BG (2x8GB sticks) and for some reason the top slot doesnt like the second stick.

When I install them the mac keep restarting by itself. I´ve tried with a lower ram stick 4 and works, (so 12GB in total) but the machine restarts after 5 minutes.

Any help will be much appreciated.

Many thanks,

Eduardo