1 - 2 horas
Power supply in iMac died and needed to be replaced.
Very smooth. Also saved some money because the part was cheaper being sourced from the US than Australia.
The only issue I had was identifying the Apple Part number as opposed to the Manufacture Part number as identified on the power supply. For future users, the part is know by the same number (interchangeable).
Manufacturer Part Number Power Supply 614-0387
Apple Part Number 661-4183