Jamma into monitor

[MR SAMSA]

I have a tekken tag jamma board that works fine and I am trying to plug it into a 21inch apple crt monitor and no video is being out put. 

I tried my 18.1 inch dell lcd and it says the signal is out of range.  I can hear the apple monitor trying to output but it doesn't.

The tekken board i read  (output sync can be 15kHz or 31kHz) and should auto detect the vga.

Do need crappier monitors? What am I doing wrong?

Thanks, SaMSa

[Malenko]

it wont work on a PC monitor, that connector is more for the JVS standard then a normal VGA monitor