Re: T420s 8Gb RAM in second slot fails to boot BIOS in ThinkPad: T400 / T500 and newer T series Laptops https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T-series-Laptops/T420s-8Gb-RAM-in-second-slot-fails-to-boot-BIOS/m-p/4111219 ThinkPad: T400 / T500 and newer T series Laptops topics Sun, 17 Jun 2018 12:44:00 +0000 tp01_en <![CDATA[ Re: T420s 8Gb RAM in second slot fails to boot BIOS ]]> https://forums.lenovo.com/topic/findpost/1300/4111219/4112117  

are you sure 2nd module was installed correctly?  If you compare both installed memory modules in their slots, do you see any differences especially where the contacts are? Maybe not all pins had contact with the socket.

 

Does the system boot if you put the new module in memo ]]> Sun, 17 Jun 2018 12:44:00 +0000 https://forums.lenovo.com/topic/findpost/1300/4111219/4112117 aUserHasNoName