Let the electrocutions begin. I worked out how to get the PSU out. You have to drop the control panel and then you can get at it.
So I have taken the PSU out and am ready to start trying to fix it. First stop will be to replace that big green capacitor which should be an easy job because it’s screwed in and doesn’t require any soldering.
Before that though I am going to take the PSU out of my Dragon’s Lair and put that in the Space Ace to see if it works. If it does it means there is definitely a problem with the PSU. If it doesn’t it’s something else.