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Here I have Lenovo Tab 4 and let me show you how to enter the factory kit mode on the following
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device or how to enter the hardware test mode. At the very beginning let's start by pressing the power key, choose power off, tap ok to
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confirm it and wait until your device will be completely switched off
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Afterwards you need to use the following combination of keys, power key and volume down
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So let's hold down together these two keys for a couple of seconds, keep holding both
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keys, volume down and power key, release them as soon as Lenovo logo pops up on the screen
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and let's just wait a few seconds until the test mode pops up
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And that's it, this is the factory kit mode, as you can see here you can accomplish the
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full test right here, you can choose PCB test, you can choose the other test or you
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can choose item test and here you can test one of the following features, for example
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the speaker, choose pass or fail
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You can also test other things such as the headset, FM radio, SD card, Wi-Fi, Bluetooth
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you can scroll down and choose LED, OTG and a lot of more, you can for example check the
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version information right here, if everything is alright let's choose pass, let's go back
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and that's it. If you would like to quit this mode let's just press power key right here and simply
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choose reboot. Tap OK to confirm it and the device is restarting and booting into a normal mode
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And the home screen just pops up, your device is in a normal mode, so everything went well
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