Troubleshooting

If you find any problem in the proper working of UDOO BOLT, please consult this section.

My UDOO BOLT doesn't boot or restart itself continuously

If your UDOO BOLT does NOT boot or restarts all the time, please check the following points:

• When the power jack is inserted the board does not start automatically. The power status LED is yellow/amber/orange and the board is in the power off state. To turn on UDOO BOLT you have to press the small power button on the front of the board. The status LED turns green when the board is powered on. Check the power button position in the Hardware Reference - Overview page.

• Check the power source you are applying to UDOO BOLT. Please, follow the Power Sources page or consult the User Manual to learn more about the power supply needed by the board for normal operation.

• Check that the restore factory configuration switch is in the right position for normal operation, otherwise the board will restart continuously. You can find info about that switch in the BIOS-UEFI Firmware page or consulting the User Manual.

• Try detaching all peripherals connected to UDOO BOLT except RAM and video cable. You should be able to see the UDOO LOGO and the first page of the BIOS.

• If you are using 2 RAM modules, try using only one RAM module at a time in the socket closest to the heatsink. If the card does not boot with either RAM modules, try using one RAM module at a time in the other socket, the one farthest from the heatsink. This is useful to rule out a problem with one of the RAM modules or one of the RAM sockets.

I see an orange LED (D13) blinking

The D13 orange LED you see is the standard Arduino LED 13. The Arduino® microcontroller (ATmega32U4) onboardM comes with an Arduino sketch (firmware) preinstalled that just blink the LED every 1 second. This is the standard Arduino first example and it is used in the board testing phase to check if the microcontroller side and communication works properly.

The Fan on top of the heatsink has a strange behaviour

If you are one of the Kickstarter users and you see a Green Dot 🟢 on one side of the fan, please check the warnings in Fan Settings page to know how to configure the BIOS settings for your fan. An incorrect configuration can also cause the UDOO BOLT to shut down because it cannot dissipate heat properly.

Blue Screen stop errors occur on my Windows installation.

If you have installed Windows on an external drive (M.2 or SATA) and occasionally there are Blue Screen stop error events (commonly called BSOD) the problem may be related to a strange behavior of the Windows eMMC driver that throws sporadic errors in memory access. This behavior is more frequent when the UDOO BOLT is in idle state. We suggest not using eMMC memory and disable it from the Device Manager.
To do so: right click on Start -> Device Manager -> Expand the section "Disk drives" -> right click on SanDisk DF4032 -> click on "Disable".

I can't install Linux distros on eMMC

If you are trying to install a Linux distribution on the UDOO BOLT eMMC but it is not seen by the installer wizard, please follow the eMMC Usage and Installations section in the Linux - Known issues page. Probably the Linux distro you are trying to install use a Linux Kernel older than the 5.2.5 version.
A Ubuntu 19.04 optimized version for UDOO BOLT that solves this issue is downloadable from the Linux section. However, newer Ubuntu version like the 19.10 or 20.04 allow the installation on the eMMC because already integrates a version of the Linux Kernel later than 5.2.5.

I can't upload sketches to Arduino Leonardo onboard

If you have any trouble uploading Arduino sketches running Linux, check the Linux - known issues section in the Getting Started with Arduino Leonardo page.
Here you can find a procedure for trying to restore the correct uploading state of sketches.