How to delete the demonstration mode

Miele cooktop induction KM 6350, 6380, 6382, 6383 dE mode
How to switch off demonstration mode
Press ‘power’ button on front and ‘lock’ bottom at same time until you get p5 mode displaying ( it is in programming) mode.
Then press top left to ‘0’, bottom left panel to ‘0’, then press right bottom panel to 9, then press on ‘power’ button to save. This should take it off demonstration mode.

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How to disable the demonstration (DEMO) mode.
Article ID: 42707 ' Last Updated: 03/11/2014
Sony® stereo systems will enter the DEMO mode the first time you power on the system or if you do not operate the unit shortly after turning on the power to the system.
To disable the DEMO mode, while the stereo system is powered off, press the DISPLAY button repeatedly until the demonstration display disappears.
NOTES:

• Depending on your model, some units have a DEMO button that is used to disable the demonstration mode. If your unit has this button, with the power to the system off, press the DEMO button until the display disappears.
• If applicable to your unit, setting the clock on your stereo system will also disable the DEMO mode.
• Using the buttons on a supplied remote control will not disable the demonstration mode.

If model-specific information is needed to complete any of these steps, refer to the operating instructions supplied with the product. Manuals, Specifications and Warranty information for your Sony product is available online.

DEMONSTRATION MODE – PROGRAMMABLE CONTROLLER MODELS
For display purposes, the appliance has a demonstration mode to enable demonstration of oven functionality without consuming power. In demonstration mode, the display, the light and the fan only are operational.
When the appliance is in demonstration mode and the display is switched on, the clock symbol will be on.
If the appliance is in demonstration mode, to operate the appliance normally the demonstration mode will need to be deactivated.
To deactivate demonstration mode:
1. Ensure the oven is off by pressing the ON/OFF button. 2. Press and hold the ON/OFF button until the display turns
ON then OFF and a single ‘beep’ is heard. Immediately after press and hold the ‘Timer’ and ‘–’ buttons simultaneously, until a triple beep sounds to confirm
the operation.

Demonstration Mode
This is to enable you to experiment setting various
programs. (The letter D will always appear in the display
window. This is to confirm that there is no microwave
power produced and it is safe to use the oven without
any food). To set Demonstration Mode: press micro
power once, then press Stop/Cancel 4 times. To cancel
Demonstration Mode press Micro power once, then
press Stop/Cancel 4 times.

To set Demonstration Mode: press micro power once, then press Stop/Cancel 4 times. To cancel Demonstration Mode press Micro power once, then press Stop/Cancel 4 times.

The words "Demo Stop/Clear" are right there on the left-hand control knob.

http://www.p4c.philips.com/files/f/fw-c788_19/fw-c788_19_dfu_eng.pdf

Page 13...

To activate the demonstration

In Standby mode, press and hold DEMO

STOPçon the system until "DEMO ON" is

displayed.

?žœ The demonstration will begin.

To deactivate the demonstration

Press and hold DEMO STOP çon the system

until "DEMO OFF" is displayed.

?žœ The system will switch to Standby mode.

Note:

- Even if you remove the AC power cord and

reconnect it to the wall socket, the demonstration
will remain off until you activate it again.

The demonstration will activate the first time you turn on
the power. When the demonstration starts, the following
message appears in the display:

“NOW DEMONSTRATION MODE IF YOU FINISH DEMONSTRATION PLEASE PRESS POWER KEY WHILE THIS MESSAGE APPEARS IN THE DISPLAY THANK YOU”

To cancel the demonstration
Press the Power 1/0 button to turn the receiver off while the above message is being displayed. The next time you turn the receiver on, the demonstration will not appear.


It's in the manual - page 3.

Viewing the demonstration (DEMO) mode
The DEMO mode automatically demonstrates several features of
your TV.
To start the DEMO mode:
1. Press MENU.
2. Press left or right button to highlight the SET UP menu.
3. Press up or down button to highlight DEMO.
4. Press left or right button to highlight START.
To stop the DEMO mode:
Press RECALL, EXIT, or POWER.
I hope this helps. Thanks for using fixya.

I had this same problem with my Maytag Microwave. Unplug the unit and plug it back in. It fixed my issue.

Had the same problem. The display of the home cinema system kept showing "sony demo". I went to the system menu and reset all settings to factory!