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I'm Michal from Lenovo Yoga Free and let me show you how to enter test mode on the following device
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So at the very beginning let's hold down power key for a few seconds, then choose power off
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and tap OK to confirm it. Wait until your device will be completely switched off
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And afterwards you have to use the following combination of keys. Power key right here and volume down and volume up
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So hold down together these three keys for a few seconds. Let me show you
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Keep holding these three keys and release them as soon as Lenovo logo pops up
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And as you can see a test mode just appears in front of you
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Now let me show you what you can do right here. Here you can navigate by tapping appropriate options and as you can see here you have the
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full list of available tests that you can perform on your device
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You can also choose for example test report. So let me choose the for example key test and now you have to use your keys to check
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if everything works alright. So let me for example choose volume up, volume down and let me choose pass
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You can also check the vibrator right here. You have to decide if the test pass or fail
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Here you have some other features for example flashlight. You can navigate here volume up and volume down by using these buttons
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So you've got 34 tests that you can perform. You can see a test report
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You can exit. You can reset all tests. So let me reset all tests and as you can see just tap OK and I just resetted all the results
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of the tests that I previously performed. So you can also choose run all right here to perform automatic tests and test all features
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or you can quit this mode by choosing reboot. So let me choose reboot and here you should decide either you would like to shut down
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the system, reboot to the test mode or reboot to Android. Let me reboot to Android so let's tap the third option and tap OK
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Now the device is restarting and rebooting into normal mode. Let me choose one more time
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So reboot to Android and tap OK. Now the device is restarting
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Wait a few seconds. Excellent
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That's it! Now you can use your device. The phone is in normal mode. So everything went well
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