Hmm I think I have one of these chassis and as far as I know it worked but didn't provide a picture (it did have a blank raster) when I tested it in place of my Wells 22v1003. It had the 22/23in pic tube. If interested let me know - yours for the cost of shipping. Its possible they use a different pinout so I don't know why it didn't work or if it does work other than bringing up a blank raster. Was told it worked when I got it.
On a side note - a lot of people have recently started having issues with the multicaps )big silver cans) these and the Wells monitors use - I'd imagine thats a possibility right out of the box, but if I were you I'd check out the schematic and see if there's any caps that weren't replaced or put in backwards in the vertical section. It looks like it has vertical foldover which is usually cap related.