I know ours, which has the same sort of on switch, but isn't fancy enough to have a time delay start, couldn't be fiddled by the start, then turn off at mains, trick. If you kill it, you'd need to hit the start button again. Its probably a NVR switch, no power, no result, and as its probalby a logic switch, or whatever they call them, holding it down may not work, as I suspect they need a single push, when the power is on, to activate them?
all in all, not easy...