Hmmm, sorely tempting. I might try recapping mine first though to see if it helps it out. My biggest issue is brightness and may be down to the age of the tube etc.
Thanks @Phipli, I had actually done that too. The sockets had a good spray of IPA and a brush with an anti-static brush. I also then applied some contact cleaner. The SIMMs themselves are a new build from SiliconInsider and so I truest they're working as expected after some discussions with him...
Thanks for sharing David. My 700 is also in a position where it won't recognise the extra VRAM I've put in. Pins in the SIMM sockets looked ok and I couldn't see any damage trace wise or cold solder joints on the SIMM sockets. But I haven't looked too closely at components like the resistor...