Phone wont power up

Try booting to recovery:

1. Hold the Volume Up and Power buttons simultaneously for a few seconds.
2. Release both the buttons once Fastboot mode appears on the screen.
3. Now, use the Volume Up/Down button to navigate to Recovery Mode and press Power button to select it.
4. Once the Android Robot screen appears, press and hold Volume Up and Power buttons.
5. Now you should be in Recovery mode. Now, release the buttons.

If you can get in recovery, I would try wiping your cache partition (you use the volume buttons to navigate and power button to select). If it still doesn’t boot after wiping the cache, you might need to factory reset the phone (which you can also do in recovery).

If the power button is broken/unresponsive then obviously using it to try to reboot the phone is pointless. I also have this same issue. I can’t find any info anywhere about fixing or replacing the power button, DIY.

Either try to get it fixed somewhere or see how much Motorola charges. Otherwise, get another phone (NOT a Motorola!). I had my phone less than 6 months when it crashed and the power button hasn’t worked since. Motorola only has a 6 month warranty for this phone - now I know why.