Have you ran startxwin.bat/.sh first? Tried it from a xterm?
Hmm weird lyx has display in a config-file.. /Andy | | The pat response to the query from the Lyx side of the house is to | modify the Lyx config file. Specifically, to change the variable | "DISPLAY =" from " localhost:0.0" to the computer's IP address e.g. | "192.168.0.102:0.0". Unfortunately, several posts seem to indicate that -- The eye of the beholder rests on the beauty!