<!-- from fixya rte -->How do i find control panel or start button - Acer C720 Chromebook Gray 11.6" Notebook 1.4 GHz Intel Celeron 2955U, 4 GB DDR3, 16 GB SSD, Intel HD Graphics, Chrome OS, LED Backlight

1. Press and hold for 3 seconds the "Control Lock/Unlock" button on the control panel to lock the control panel.
2. Listen for a double beep and observe the "Control Lock" status light is lit when the control lock is in effect.
3. Press and hold for 3 seconds the "Control Lock/Unlock" button on the control panel to unlock the control panel. The "Control Lock" status light is goes out when the control panel is unlocked.

• Click the Start button, and then click Control Panel.

• In Control Panel, make sure you are in Classic View, with all Control Panel icons showing. If not, click Switch to Classic View in the left pane of Control Panel.
  

• Click Mouse to open the Mouse Properties dialog box. Click the Buttons tab for the Buttons configuration box. Select the Switch primary and secondary buttons check box. Click OK.
  

• Click OK, and then click the Close button in Control Panel.

Problem maybe that the START/PAUSE button has broken loose from the control panel. All the buttons are attached to control panel and "hinged" so when you press the button, the button presses a small button switch on the display control. You may have to order
the Control Panel.. Disassembly is required to inspect.
It would be least likely that the Display PCB is bad..

This will only control the diagnostic service mode, it will not run a regular wash cycle.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jeffrey_634abadf963e31e5

Had same problem but solution was different. Start button looked slightly misaligned and wouldn't always work. Followed instructions to pull off front control panel, removed LED display panel and the plastic tab that the start button was attached to had broken off from the panel. Used a good epoxy to glue the edges back together and it works like new. Also broke two tabs that hold the LED panel inside the front plate due to the plastic becoming brittle. Again, epoxy is your friend. Works like new.

PRESS AND HOLD THE BUTTON NEXT THE LOCK3 LIGHT FOR 3 SECONDS TO UNLOCK THE CONTROL PANEL. TO RELOCK THE CONTROL PANEL PRESS THE SAME BUTTON FOR 3 SECONDS. THANKS AGAIN

Which operating system ??

In Windows and on a Mac, you can use an icon shaped like an audio speaker to adjust the computer's volume or mute the sound output completely.

Whichever operating system you are running, it is possible to remove the volume icon from the screen.

If you have removed the volume icon accidentally, you may not have a convenient way to adjust your computer's sound volume.

Restore the sound icon to resume using it to adjust the volume or mute your computer's sound output.

Click the "System Preferences" icon on the dock.
If you have removed this icon from the dock, click the Apple icon at the top of the screen, then click "System Preferences."


Click the "Sound" icon in the "System Preferences" window.

Place a check in the box at the bottom of the window labeled "Show volume in menu bar."
The sound icon appears at the top of the screen.
Close the window to resume using your computer.
Restoring the sound icon in Windows 7

Click the Windows Orb (Start button), then click "Control Panel."
Click "Taskbar and Start Menu."
If you do not see this icon, click the "View by:" drop-down menu at the top of the window and select "Small icons."
Click the "Taskbar" tab, then click the "Customize" button.
Click the drop-down menu next to "Volume" and select "Show icon and notifications."
Click "OK" twice and close the Control Panel.
Restoring the sound icon in Windows Vista

Click the Windows Orb (Start button), then click "Control Panel."
Double-click "Taskbar and Start Menu."
If you do not see this icon, click the "Classic View" link.
Select the "Notification Area" tab. Place a check in the box labeled "Volume."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows XP

Click the "Start" button, then click "Control Panel."
Double-click the "Sounds and Audio Devices" icon, or click "Sounds, Speech and Audio Devices," then click "Sounds and Audio Devices."
Place a check in the box labeled "Place volume icon in the taskbar."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows 2000

Click the "Start" button, then click "Settings" and "Control Panel."
Double-click "Sounds and Multimedia."
Place a check in the box labeled "Show volume control on the taskbar."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows Millennium Edition (ME)

Click the "Start" button, then click "Settings" and "Control Panel."
Double-click "Sounds and Multimedia."
If you do not see this icon, click the "View All Control Panel Options" link.
Place a check in the box labeled "Show volume control on the taskbar."
Click "OK" and close the Control Panel.
Restoring the sound icon in Windows 98

Click the "Start" button, then click "Settings" and "Control Panel."
Double-click "Multimedia."
Click the "Audio" tab.
Place a check in the box labeled "Show volume control on the taskbar."
Click "OK" and close the Control Panel.

Try getting in through the start menu, your documents, and your search bar. If all fails, then start your computers command prompt, (type in search button in start menu: "cmd") just type in: "start control" and press enter; the control panel will launch. Also, if you type "run" in your start menu search bar and type in control followed by pressing the enter key, the control panel should start up.

I think you still have warranty, it sounds you have faulty control panel, even if it's new does not mean it is good.

make sure the unit is not control locked, usually holding start for 5 seconds activates this, most kitchenaids contain a lock symbol on control panel so hold that if you have it.

if its not control locked and not in sabbath mode (sometimes this is a SAB or to some looks like 5A6 on control panel) holding clock pad for 5 seconds activates and deactivates this same as start does with control lock

when you order the part you want to replace the part called Clock AKA PCB AKA ECB, these are the three most common names, the control panel is the decorative cover