I bought a house with an existing CBus system. I have 11 X 4 channel units with 5 dimming units and 6 straight relays. It was installed in the roof space. It doesn't have a display. The house was built around 2000 so I assume the unit is 16 yrs old. Recently I came in to the kitchen to find the wall switches flashing and the lights unresponsive. They eventually worked but I had this problem happen several times over several months. I called in a certified Clipsal technician who said that the whole system needed to be upgraded because it was an old system but after he told me it was going to cost 000 I thought he was just after a quick buck. I was not convinced he knew what he was doing. I called in another tech who gave me even less confidence as he was not able to determine if it was a fault with the power supply or with a relay or with a dimmer. He didn't seem to know what he was doing. So I just left everything for the time until I could find someone I could trust. About a month ago I came in and found the whole system would not respond. I booted the house 240 v power supply at the circuit breaker and the lights started working again after an hour. All the lights have been working since although i have had the odd occasion where one relay was briefly unresponsive in the morning. I find this very odd. From my deductive reasoning, it would seem to be a faulty/ variable power supply. I would feel a bit better if I could at least understand the problem. how I can do to do a proper diagnosis? I am a bit worried about calling in another tech as they seem to know about as much as me and Seem to be more interested in selling me a new system because they don't know what is wrong - which I can't afford. How do I find a good CBus tech in perth???