I need help NOW! 1069-1 board

Just got my 1069-1 board hooked up to my SG and when I turned it on everything was o.k until it went to the main screen where you select the games. The entire screen is flickering and I don't know how to fix it. Could this be do to my voltage on my SG or something small? I don't want to shut it off because you can screw up the hard drive. There is a proper system shutdown on the system but I can't see how to do this becasue the screen is flickering. My SG is regular s-video.

Please help me

Just sent you a PM.

You need to change the video mode on the 1069-1.

On SW2 flip #4 then press the video button on the 3&4p PCB until you get the setting you want then when done flip SW2 #4 back off.

1. VGA (31khz)
2. NTSC (15khz)
3. PAL (15khz)
4. SEGA (24khz)

Edit: Added frequency per setting.

Thanks XX