I have lost power after refurbishing.

Have you tried it in another outlet? Which parts did you replace, and what was the original issue you were trying to fix? Sometimes the power/ready lights burn out so this alone isn't a good indicator of the machine having power; have you tried both the coffee button and turning the steam knob to see if either one activates the pump?

You'll need a voltmeter/multimeter to start troubleshooting, and the first thing to check should be the thermal fuse that's clamped to the top of the boiler; if the machine overheated and this fuse popped it would cut all power to the machine. Next check that the power switch is properly opening and closing when pressed, and that current is flowing through it. Report back with your findings and I'll tell you what to look at next.