Almost all modern devices allow using the service mode. Let's consider it on the example of monitors in which it is possible for the user to independently adjust the image using the service mode. For this, controls are located on their bodies.
Necessary
Monitor manufacturer's instructions for service centers
Instructions
Step 1
To enter the service mode menu, turn off the monitor power.
Step 2
Then press the MENU button on the monitor panel and turn it on. For a few seconds, wait without releasing the buttons until a service message about opening a service block or menu appears on the monitor.
Step 3
Go to the menu and make the required settings, referring to the instructions for service centers. Each manufacturer sets its own methods for entering service modes, but for most, this is the most frequently used method.
A different combination and startup algorithm may be required. More details can be found in the service documentation for each model.
