Monitor testing

Hi

I have an old Olympic Pokie that I brought to Mame but as usual I like to see if it can be fixed first. Reading archives on here and the net it looks highly unlikely.

First thing is to see if I can get some video happening to see the fault list.

When I turn it on I get the display of vertical lines in the first pic. (Sorry pic has rotated 90 deg and I can't turn it back)

I don't know if it is a monitor fault or a video output fault.

The monitor is a RGBs (Red Green Blue Sync Earth), so to test this, I plugged it to a 60 in 1 card to provide a RGBs signal in to the monitor..

I get the second pic.(Sorry again pic has rotated 90 deg and I can't turn it back)

Should that have worked?

I didn't use screened cables and the 60 in 1 was supplied through an old computer power supply. The Screen was powered through the Pokie power supply as it has special plugs and I think is 110Vac (didn't check yet but on drawings). I was hoping to see some image, maybe not great due to the rough connections but something.

If I connect only one RGB signal at a time I get the similar image in that color only as expected.

If the images were the same from either source, then I would say the monitor is U/S or if the 60 in 1 worked the video out is U/S.

It would be great if anyone could tell me what the images are caused by and push me in the right direction

Cheers

Andy