Dreamcast - arcade monitor (15khz hack) problem

[kwiniarz]

Hi, i'm having a problem with with my dreamcast - arcade monitor hack. I see the logo and then it fades white and I cant see anything. Does anyone know how to solve this?

[kwiniarz]

i'm also running this through a j-pac

[viletim!]

Could you elaborate a bit.... how are you connecting the dreamcast to your j-pac (video amplifier isn't it?)

[kwiniarz]

my setup

dreamcast-- vga-box --- jpac -- jamma

vga box has been modified to output 15khz