MacBook Pro touch bar frozen

How to Manually Refresh Touch Bar on MacBook Pro - OSXDailyosxdaily.com/2017/01/11/manually-refresh-touch-bar-mac

To force a re-boot press and hold down the Power button until the computer shuts down. Wait 15 seconds before restarting. After forcing a shutdown or power failure, run First Aid in Disk Utility to repair the drive in case it has become corrupted.

Try an SMC reset & PRAM reset.

There normally is no startup sound on newer models running macOS. Could you please provide as much information as you can about the current state of the computer? For example, do you see an Apple logo and progress bar when the computer is starting up? If not, what do you see after turning on the computer? Do you get a login window? Do you have the computer connected to the charger? And, is the charger plugged into the wall outlet? Have you tried booting from the Recovery HD? See below:

Boot from the Recovery HD

1. 1. Restart the computer.
   2. Immediately after the chime press and hold down the "COMMAND" and "R" keys together.
   3. Release the keys when the Apple logo and progress bar appear. 
   4. Upon completion the Utility Menu should appear.

If you can boot from the Recovery HD, then use Disk Utility to run First Aid:

1. 1. Select Disk Utility and press the Continue button.
   2. Then select the indented (usually, Macintosh HD) volume entry from the side list. 
   3. Click on the First Aid tab in the toolbar and wait for the Done button to activate. Click on it, then quit Disk Utility.
   4. Select Restart from the Apple menu.

Are you able to boot from the Recovery HD? If so, then do the following:

1. Restart the computer.
2. Immediately press and hold down the "COMMAND" and "R" keys together.
3. Release the keys when the Apple logo and progress bar appear. 
4. Upon completion the Utility Menu should appear.
5. Select Disk Utility and click on the Continue button.
6. Select the indented (usually, Macintosh HD) volume entry from the side list.
7. Click on the First Aid icon in the toolbar. Wait until the Done button activates, then click on it.
8. Quit Disk Utility and return to the Utility Menu.
9. Select Reinstall OS X and click on the Continue button.

This will try reinstalling macOS over your existing system without erasing the disk, thus, preserving all your files if it is successful. If this is not successful and you still cannot startup, then I recommend that you make an appointment at the Apple Genius Bar for service. If you need to find an Apple Store - Find a Store - Apple. Also, see How to find your nearest Apple Authorized Service Provider (AASP) or Distributor (AAD). 

"Your Apple-branded or Beats-branded hardware product (“Product”) is warranted against defects in materials and workmanship for a period of ONE (1) YEAR from the date of original retail purchase (“Warranty Period”) when used in accordance with Apple`s user manuals (refer to www.apple.com/support/country). Under this warranty, you will be able to direct your claims to Apple even in situations where you purchased the Apple Product from a third party.” [Apple One (1) Year Limited Warranty – Accessory - For Apple and Beats Branded Products Only.]