Cleaning The Display; Using Touch Screen In Windows 10; Connecting To External Display Devices; Realtek Alc3253 Waves Maxxaudio Pro Controller - Dell Latitude 3390 2-in-1 Owner's Manual

Cleaning the display

1 Check for any smudges or areas that must be cleaned.
2 Use a microfiber cloth to remove any obvious dust and gently brush off any dust particles.
3 Proper cleaning kits should be used to clean and keep your display in a crisp clear pristine condition.
NOTE: Never spray any cleaning solutions directly on the screen; spray it to the cleaning cloth.
4 Gently wipe the screen in a circular motion. Do not press hard on the cloth.
NOTE: Do not press hard or touch the screen with your fingers or you may leave oily prints and smears.
NOTE: Do not leave any liquid on the screen.
5 Remove all excess moisture as it may damage your screen.
6 Let the display dry thoroughly before you turn it on.
7 For stains that are hard to remove, repeat this procedure till the display is clean.

Using touch screen in Windows 10

Follow these steps to enable or disable the touch screen:
1 Right click on the Start menu.
2 Select Control Panel.
3 Tap Pen and Input Devices in the Control Panel.
4 Tap the Touch tab.
5 Select Use your finger as an input device to enable the touch screen. Clear the box to disable the touch screen.

Connecting to external display devices

Follow these steps to connect your laptop to an external display device:
1 Ensure that the external display device is turned on and plug the external display device cable into a video port on your laptop.
2 Press the Windows logo+P key.
3 Select one of the following modes:
• PC screen only
• Duplicate
• Extend
• Second Screen only
NOTE: For more information, see the document that shipped with your display device.

Realtek ALC3253 Waves MaxxAudio Pro controller

This laptop is shipped with integrated Realtek ALC3253–CG Waves MaxxAudio Pro controller. It is a High Definition audio codec designed
for Windows desktop and laptops.

Downloading the audio driver

1 Turn on the laptop.
2 Go to www.Dell.com/support.
3 Click Product Support, enter the Service Tag of your laptop and click Submit.
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