New LVDS LCD LED Flex Video Screen Cable for Acer Aspire S3-371 S3-391 S3-951 Ultrabook P/N:SM30HS-A016-001 (Note: comes with 2 buttons for this cable) : Amazon.co.uk: Computers & Accessories
Setup Acer EI491CR monitor for Picture-By-Picture (PBP) Mode - Acer Community