i think it wouldnt work

This is rather too weak at 42 V (14 V x 4 A = 56 W). The only thing I have found is: http://www.netzteilshop.at/samsung-14v-4a-56w-p-44284.html However, I don't know how trustworthy the dealer is, nor whether S27A950D has anything to do with SA950DSL (I can't find anything about the latter). S27A950D: https://www.samsung.com/us/support/owners/product/3d-led-monitor-a950d If there is a type designation on the original power supply, that might help.