Trying to run a system 18 on a Sega blast and 2930 chassis

[8bitforlife]

Trying to run a system 18 on a Sega blast and 2930 chassis. I'm getting sync problems. It works on my Has but not my blast.

I'm not the most knowledgeable about wiring stuff but if you know how to fix this pictures showing me how to fix this would be best. Ty

[DaveyD]

Is there a jumper you have to manually change for the resolution on that monitor?

[nem]

Yes, there is. It's on the upper right corner of the remote. Three really small dipswitches. You want it on 15khz and AMP for System 18.

If those are set correct, then you need to pull out the monitor and adjust H.H 15 pot (horizontal hold).