It seems to be slightly better now one speaker is removed (these are the original cab speakers) could it be the speakers are causing it? The 240v 110v stepdown is as far away as possible . Should I change this to a newer one it still has the original power supply too. Here are some pictures I don't even notice the slight tearing now. Will this cause damage if I leave it? Also sometimes the screen seems to shimmer?
I am pretty stoked with the way it has turned out considering it didn't work before and it didn't cost me anything

Just swapped the video side of the board with another one ( I just happened to have lying around) and this fixed some graphic glitches I was getting the game runs beautifully!!!
Still don't understand way the speakers didn't effect it before (same monitor ) but now they do should I just replace them with shielded ones?
Thanks for your help mate