After a power failure at my work space I lost a MP1.1, Didn't solved it yet. But to continue with the work I bought a MP2.1 from a editor. It seems good at his place. After I have installed it at my workplace it seems to be turning on itself without touching the power button. All I did is connected the power plug to my spike box and that's it, it is turning on automatically. I have also checked the energy saver settings. The option "Start up automatically after a power failure" is off by default. I didn't even turned it on.
Any help could be helpful and appreciated. Thanks in advance.
2X3GHZ quad-core intel xeon
4X8gb 667mhz ddr2 fb-dimm
ATI Radeon HD 5770
Mac Os 10.11.6 El Captain.