Won't turn on - KitchenAid Artisan KSM150PSAQ Stand Mixer

You have put the "chalk thing" back in incorrectly, it only fits one way, use a torch and look in the hole and line the missing corner on the "chalk thing" up with the blocker.

If the mixer died completely and no noise at all comes from the machine you need one of three things.
1. New brushes2. new speed control switch3. a new motor.

The KP26 is a 6 quart mixer of the new design, post 2002, it is easy to work on and relatively inexpensive for parts if it turns out to be the motor that will be about $100.00, the speed control about 30.00, the brushes on this mixer cannot be replaced you have to install a new motor, sry about that. Hope this helps let us know. But first check that the electric outlet you are working from has not tripped the breaker on the circuit too. I know I know it's silly to say but check the outlet first before you spend a dime on anything.

bread is very tuff on mixers. always buy the strongest mixer that you can afford. im guessing the field in the motor fried.

Sounds like the carbon brushes under the black side caps or failing that a broken wire.

In my case, capacitor C1: 470nF (on the circuit board) proved to be the cause. It measured only half its normal value. It's part of a voltage divider used in place of a transformer. Replacing it solved the problem.
Came already across the same problem in another circuit.

Check carbon brushes, check for broken wires under back cover.

This particular model has some sort of internal electronics that require a charge before the unit will function. As a result, when allowed to sit in the cabinet for a long period of time it will simply not turn on. Instead, all you will hear is a "click" noise when you try to power it on. When you get the dreaded "click" noise leave plugged in for several hours and try again.

Obtain a copy of the Repair Part List for your model from Kitchenaid.com.
Download a Copy of the Kitchenaid Service manual.

http://www.kitchenaidparts.be/centers/servicemanual/mixer.pdf

First, you may want to adjust the mixer's speeds:

1. Loosen the lock nuts enough & Turn the 2 top screws clockwise until they cannot be turned
anymore. Leave the bottom screw alone for now.
2. Use a dab of white paint or paper whiteout to mark the positions of the Phillips screws.
3. Plug in your mixer and Set the speed selector to "Stir".
4. Turn each top screw One full turn couterclockwise (alternating between Left and Right)
Keep making one full turn at the time (for both left and right) until the motor starts running.
5. Put your hand near the Agitator shaft and allow it to brush your finger slightly. Use your
watch or clock and start counting the number of times the shaft touches your finger in
60 seconds. The correct count should be 60 RPM (Rounds Per Minute). If it is less
or more than 60, give each screw 1/4 turn counterclockwise or clockwise and start counting
again. Now tighten both lock nuts.
6. Set the speed selector to "6" and turn the bottom screw either clockwise or counterclockwise
to achieve a speed of 180 RPM.

For your reference, the planetary RPM's for the 5-qt. tilt-head Artisan Stand Mixer are as follows:
Stir speed - 60
Speed 2 - 95
Speed 4 - 135
Speed 6 - 180
Speed 8 - 225
Speed 10 - 280

Second, if the mixer won't run:
Remove the Control Plate Assembly (36), the Phase Control Board (39)
and the motor Governor Assembly (35). Inspect for loose connections,
burnt or damaged components. If they seem to look OK, re-assemble
them and test the mixer. If the motor still won't run, then I might suspect
a defective Phase Control Board (39).

Hi, Did you push the beater in so that it clicks. If all is good there, gear box maybe at fault or jammed. Take it to a service center for repair. If you are machanicly inclined (DIY) Take it apart and see why its not turning. Good luck.