Right Lads and Lasses, get your thinking caps on.
Yesterday I pulled my brothers Lenovo Z50-75 laptop apart to clean, reapply thermal paste and install an SSD. When i reassembled it it wouldn't post with the 8GB RAM module that was in it. It will however boot with the 2x4GB set from my HP laptop, and the HP with boot the 8GB module.
If the Lenovo has one of the 4GB and the troublesome 8GB installed it boots but shows 12GB installed with 8GB hardware reserved, If the module was new I'd say its not compatible but its been working in the system for 4 years.
Anyone got any solutions or have had similar experiences?
Ta Muchly