Im sorry if I had known I would have given you this information straight away. I assume this machine has stayed in England, but I can't know for certain as I bought it on an online auction site.
Its model number 6028 Serial 42
Digital board rev 0, serial number 64
Is there any other information that you need to know?
I don't know of any good service centres as I never use them, I am myself a service technician! But unfortunately I am not familiar with this vintage digital circuitry, it was made before I was born! I was hoping when I bought it the solution would be a mechanical one with the drives or a power related one with the psu, I took a gamble I guess.
That was not me asking about what components store energy, it was someone else...I would not risk opening and tampering with this synth if I didn't even know that it was the capacitors!
I have asked around and the only person I was able to find within a reasonable distance from me who would be qualified to understand what was wrong with it replied with an automated email saying they are not taking any orders for the foreseeable future.
I don't suppose I could persuade you to offer some more troubleshooting advice? I'd happily pay you for you for your time. I completely agree with you that I should take this to a tech centre, but I am all out of options.
I am going to replace the Z80A SIO2 and hope that it will bring it back to life. If not it's time to sit in the corner and cry