Toshiba memory adding problem

eglioltereg

Prominent
Sep 20, 2017
1
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510
I'm trying to add 4gb ram to my toshiba satellite p75 a 7200 laptop. It has 4 slots for memory (two as primary and its works now - has 2x4gb). I'm trying use additionals.
Memory is ok (tested on another laptop and seems fitting.
After addin to any of 2 additional slot laptop don't want to wake up.
After pwr-on it works maybe a second or two and shuts tottaly down.
Any ideas?