My otherwise very reliable TZ has developed a problem. When I turn it on, it won't boot immediately. I get a pop in the speakers; a line in the display; and then a single bong. On the CPU board, All 3 of D19, D20, and D21 come on immediately and stay on solid. Then after about 1 1/2 or 2 minutes, the machine will suddenly boot properly.
It almost sounds like a bad solder point given the delay, as if something is heating up and finally making contact. Maybe no 12v initially, but then something corrects itself. But that's just a guess. Fuses are all OK.
Looking for ideas , please.
Andy