Hello,

I am trying to upgrade my Vostro 1540  RAM 2GB laptop with: 4GB DDR3 SDRAM SODIMM 1600 MHZ (PC3-12800)

Unfortunately it does not work... the screen of my laptop scrambles into unusual pattern and showing message and purchased 4GB RAM image also attaching.

Can someone please tell me what do I have to do to use my new RAM modules?

Thank you!