On lifting the PSU out, I found that the Yamaha sound chip was missing. A quick clean of the area shows some via damage, but fortunately nothing too terrible, and eminently repairable.
I'll fit a socket once I've given the board a damn good clean, as it's quite grubby right now and drop in a spare chip.
Next on the agenda will be the PLCC sockets, whuch along with the chips (Just GLUE & MMU, no blitter right now) seem to be heavily oxidised, and some of the socket contacts look a bit wayward, so will need cleaning & tweaking.
The previous owner did say he tried to fit a Blitter, but it still didn't work, and the jumpers are still bridged, so they will need to be cleaned up for now, as I'd rather try to get it working Blitterless to begin with for simplicities sake.
Not yet quite worked out a plan for the keyboard, though I could fit my CosmosEx internally, as it'll give me hard drive (Looks like there is an internal ACSI port already, just need a cable), network and USB for KB and mousage. Only problem there is I'd need to work out some sort of IKBD connector for the CosmosEx IKBD injector.
For interests sake, the mainboard is this model: https://www.exxosforum.co.uk/forum/viewt ... f=55&t=527
