DMTech 1019QCB, Manual

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Doing factory reset by Recovery Mode
x
While the tablet is powered off, press and hold "Power" and "Vol+" buttons
at the same time for 10 seconds.
x
Use Vol+ / Vol- to move the highlight to "Yes - delete all user data".
x
Press "power" button to select.
WARNING:
Your tablet will be reset to factory default and all data will be deleted.
76
HDMI
The device features a HDMI interface with which you can connect the device to digital
televisions. HDMI connection can deliver high-definition audio and video quality.
To use the HDMI function on digital televisions:
1. Open the Settings menu, then select HDMI setting to turn on HDMI output
and choose an HDMI resolution option;
2. Turn on the digital television, and switch its Source mode to HDMI.
3. Connect the device to the digital television through HDMI cable.
4. Once the connection is built, the display of the device will turn black,
and simultaneously the digital TV shows what should be displayed on
the device screen.
5. To switch the display back from the TV to the tablet, just disconnect the
HDMI connection.