Ok so I've just recieved 2x 4GB SODIMM DDR3 1333Mhz (204pin) from Amazon, (The specs I double checked by reading the Lenovo forum and the manual before purchasing. Although the motherboard uses 1066mhz, it apperently has no issues running 1333mhz ram.
So I take out the old default 2gb stick and put in my new RAM. Low and behold I am welcomed by a black screen. I remove my new RAM sticks (2x 4gb) and try each stick individually to see if they may be faulty. Again no luck, I'm once again greeted by a black screen. So I take my new RAM out and put the old standard 2gb stick in once again and all is working 100%.
I can assure that the RAM was correctly inserted into the slot(s), and that by testing my new RAM individually that they're not likely damaged. I can only assume my new RAM is incompatible with my notebook!
Can somebody please assist me here, I'm going nuts trying to figure this out. I've got many threads on this forum confirming that the RAM specs I chose should be compatible. Please somebody point out the error in my ways.