Please help get my dead K10 back up and running.

Grinder acts like it has no power. There is no response when the power switch is flipped. When I first got it it was dead for 15 min, then started working after I fiddled with the switch and plug. It has done this sporadically after that too, but would come back to life until 2 weeks ago and it has been dead since.

I first thought it was the switch, and I got a new one from Compak but that didn't solve the issue. I borrowed a multimeter from a friend and verified the switch is working properly. I found that the relay is not making a sound when the power gets applied, but I'm not sure if this kind of relay makes a noticeable sound or not. Can anyone with a K10 verify they can/can't hear the relay switch?

I have a wiring diagram (link below). Using the multimeter I tested the resistance throughout the circuit and did not find any breaks. I also took the AC voltage at different points in the circuit with the power on. It reads 120v at all points I tested: off switch terminals 2 and 4, at all 3 relay terminals, and at each capacitor terminal. I understand the relay will only be on a short time to start the motor, but I'm not sure how to test it further.

Thanks for any help/suggestions.

Wiring diagram: http://www.megaupload.com/?d=2BKGDZIJ
(sorry about the megaupload link, I wasn't sure where else to host it.)
Relay info sheet: http://www.servorecambios.com/recambios...n_2cra.pdf