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Doing an Android reset

1. Before clearing android cache, ensure PC module (if present) is removed from screen
2. Ensure screen is switched off
3. Press and hold power button on screen when LED is red and wait 20 seconds
4. This takes you to android recovery menu
5. Tap screen to scroll through menu and highlight Wipe data/factory reset
6. Long press on screen to select Wipe data/factory reset
7. Highlight Yes (short press) and then long press to select it
8. When factory reset is complete, select Reboot system now (short press)
9. Long press to reboot system
10. Screen now turns off and displays welcome screen when screen turns back on