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As an electronics engineer I have replaced the suspect capacitors in the psu and all voltages have been checked and are correct.
All capacitors on the secondary side of the psu including the 2200 and the 680. The main smoothing on the primary side ok. All voltages are now correct and stable. Happy with the psu. Have visually checked the capacitors on the mother board and they appear to look ok.
C12 replaced if you mean on the psu. There are no problems the voltages are stable and have been checked for ripple with an oscilloscope and everything is ok. Happy with all supplies. Just cannot get any response from the unit other than the green revolving leds on the front. I just cannot seem to get the machine to see any input eg firmware upgrade from the stick. I must be overlooking something or doing something wrong. I am so close yet so far away...
I rather thought that this would be the case. It is a pity that there isn't an exchange system where I could replace the board myself. When you are retired recently like myself it would still keep me in good mental order doing work like that it is no problem at all to me. I wonder whether it is viable to repair it weighing up the pros and cons. I will have to get an idea of the cost involved as the unit is out of warranty. Oh well on to the next faulty machine. I will be happy to do you customer report on your next reply. Many thanks Paul.