# My device is not booting!

**URL:** https://community.muos.dev/t/my-device-is-not-booting/35
**Category:** FAQ
**Tags:** blank, rainbow, black, fake, battery
**Created:** [March 19, 2025, 12:32am UTC](https://community.muos.dev/t/my-device-is-not-booting/35 "2025-03-19T00:32:20Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![system](https://community.muos.dev/user_avatar/community.muos.dev/system/32/2547_2.png) [@system](https://community.muos.dev/u/system)
#### Post date: [March 19, 2025, 12:32am UTC](https://community.muos.dev/t/my-device-is-not-booting/35/1 "2025-03-19T00:32:20Z")

</div>

Well that sure is unfortunate! Here are a couple of things that you can consider looking at or trying.

### [Is the battery charged?](#battery)

You’d be surprised at this. If your device shows the boot logo for a split second and then goes black and there is **no green LED** then chances are your battery needs a bit more juice.

### [Oops, wrong slot…](#slot)

Ensure that the mSD card you flashed muOS to is in the primary (_sometimes marked as TF1_) slot of your device. If there is only a single slot on the device then we’ll have to try something else!

### [Verification and authenticity](#verify)

One of the biggest things these days are fake cards, use tools like [h2testw](https://h2testw.org/) (Windows) or [f3](https://fight-flash-fraud.readthedocs.io/en/latest/introduction.html) (MacOS/Linux) to check if your mSD card has any issues. See [Issues with mSD Cards](https://community.muos.dev/t/issues-with-msd-cards/28) for more information.

### [Pretty Rainbow Lines](#rainbow)

If you see a white screen with vertical coloured lines then you have flashed the wrong image for your device. Quickly take the mSD card out and press reset to clear the screen. **Leaving your screen on in this state may cause issues!**. Reflash with the correct image for your device, insert it, then press the reset button twice.

### [Nothing else happens!](#nothing)

Oh dear, well sometimes if you start the device without a valid mSD card in can get stuck in a debugging mode (called [FEL Mode](https://linux-sunxi.org/FEL)). No worries!

- Make sure you have a working mSD card in the device.
- Then hold the power button down, press reset 3 times, let go of the power button.
- Plug in the USB cable for power _just in case_.