FAQ

Q1: Connecting Communities

Please refer to https://docs.radxa.com/welcome

Q2： Can the ROCK 5T boot from a PCIe M.2 NVME SSD without an eMMC and TF card?

Yes, the ROCK 5T can boot from a PCIe M.2 NVME solid state drive. ROCK 5T is equipped with a 16MB SPI Nor Flash and PCIe M.2 M-Key interface. The SPI Nor Flash stores the boot loader, and the NVME SSD stores the entire system image (including at least the kernel and rootfs). See this guide for more information on writing images. SPI Nor Flash and PCIe NVME SSD boot.

Q3： Also, are heatsinks and fans included in the price?

No, the heatsink and fan are not included by default.

Q4： My ROCK 5T won't start, how do I check if it's broken?

Follow the steps below to troubleshoot ROCK 5T:

• Power off the ROCK 5T and remove the eMMC module, SD card, and NVMe SSD.
• Press and hold the MASKROOM button [(tag 32)](. /hardware-design/hardware-interface)
• Plug the ROCK 5T USB C connector into the computer using the USB A to C cable, then connect the DC 12V power adapter (supports DC 9-20V input, 12V recommended), the green LED should light up.
• Check if there is a new USB device in the computer's Device Manager, if so, the ROCK 5T is active. If not, try another USB port, we recommend connecting the ROCK 5T to the rear panel of your computer.

Power supply note

The ROCK 5T is powered by a DC 12V adapter (or PoE). The actual input range is DC 9-20V and 12V is the recommended adapter voltage. The on-board USB Type-C port is only used for OTG/data and entering Maskrom mode; it does NOT power the board. When troubleshooting whether the board can start, make sure the DC adapter is connected first.

Q6： My ROCK 5B HDMI does not display anything!

• You can manually add the HDMI resolution and frame rate in /boot/extlinux/extlinux.conf
• Just add video=1920x1080@60 in an additional line (just change the resolution and frame rate to the resolution supported by your monitor)

Q7： I burned eMMC with RKDevTool successfully, but after powering up, the Led doesn't flash and there is no output on the screen.

Confirmation:

Remove the microSD, NVME device and short DISABLE SPI pin, then connect the board and PC via USB cableand press Maskrom key，then see if the device enters Maskrom state. If it's not in MaskRom state, it's most likely due to the following reasons.

In Burning system to eMMC via USB, did not follow the instructions to press the Maskrom button, causing the system to reach the SPI Flash, and when the system starts, it reads the SPI information first, and then there is an error and it cannot start normally.

Solution:

Empty SPI Flash, then follow the steps again Burn system to eMMC via USB

Q8： Radxa APT public key not available

When I try to run apt update, I get the following error:

root@rock-5T:~# apt update
Hit:1 http://security.debian.org/debian-security bookworm-security InRelease
Hit:2 http://httpredir.debian.org/debian bookworm InRelease
Get:3 http://apt.radxa.com/bookworm-stable bookworm InRelease [2362 B]
Hit:4 http://httpredir.debian.org/debian bookworm-updates InRelease
Hit:5 http://httpredir.debian.org/debian bookworm-backports InRelease
Err:3 http://apt.radxa.com/bookworm-stable bookworm InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9B98116C9AA302C7
Reading package lists... Done
W: GPG error: http://apt.radxa.com/bookworm-stable bookworm InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9B98116C9AA302C7
E: The repository 'http://apt.radxa.com/bookworm-stable bookworm InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

The reason is that the public key has expired. You can execute the following command to get a new available key.

sudo apt-get install -y wget
export DISTRO=bookworm-stable
wget -O - apt.radxa.com/$DISTRO/public.key | sudo apt-key add -
sudo apt-get update

Q9： Fan does not rotate/How to install the fan

Please follow the Fan usage tutorial.