Hi , we have an unusual issue with a Macbook Pro 15" unibody. DC board has been swapped , PSU has been swapped , power button on tested OK yet the mac fails to show any power on signs at all.
The charger lights as normal , orange with battery installed , green when charged. Power button pressed does not have any effect. No optical drive noise , No fans.
All logic board fuses test OK. At a loss where to look next?