Invert video ?

[kjoel0123]

I have a jamma cabinet with the following games: ikari3, double dragon 2 and neo geo.

Ikari3 and dd2 video is ok, however neo geo is upside down. I put the neo geo board in my other arcade and it is not upside down. Strange....

To solve I flipped some dips on the dd2 and the ikari 3 board and they are ok but the neo board is not.

My Question:

How do I get the neo geo board to invert? there are no dips on the board to do this

Other resolution would be to physically flip the monitor but then I wont be able to adjust it..

Any ideas...

[grantspain]

i am pretty sure you had to access the test and adjust it in settings,you may need to add a switch on your jamma loom to do this(toggle switch type otherwise it comes straight out of test),otherwise depending on your monitor chassis you could reverse the scan coil plugs so you don't have physically move your tube(only if it has two seperate plugs for the scan coils otherwise you will have to chop and change wires)

[kjoel0123]

I placed the pcb in test mode, there are no settings to invert the video. Can you please explain the scan coil plugs reverse process, thank you

[thebrownshow]

Do a yoke flip:
http://homearcade.org/BBBB/yoke.html