# CuBox-M not boot
**URL:** https://community.solid-run.com/t/cubox-m-not-boot/139
**Category:** NXP i.MX8M Plus
**Created:** [August 16, 2021, 8:36am UTC](https://community.solid-run.com/t/cubox-m-not-boot/139 "2021-08-16T08:36:48Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Checker](https://community.solid-run.com/u/Checker)
#### Post date: [August 16, 2021, 8:36am UTC](https://community.solid-run.com/t/cubox-m-not-boot/139/1 "2021-08-16T08:36:48Z")
So we have used over 300 Solidrun Cubox-i (model: I2EXW-300) and now Cubox-M for the first time. The first thing I don’t understand is that the sticker doesn’t say what model it is. We have bought the 1GB and 4GB version and they are not distinguishable externally.
I have loaded the images from [SolidRun Images](https://images.solid-run.com/IMX8) and copied them to the Micro SD card. No device could be started. I have tried Debian and Android but neither works. However, I was able to find that with Power over Ethernet the image “ **sr-imx8-debian-bullseye-20210621-cli-imx8mp-sdhc-cubox-pulse.img** ” starts and I can log in via SSH. On the HDMI port I have no picture or signal. I tried 8 different models in the process. On the old models there was an OTG interface with which you had a serial console. This interface if it is present on this model does not work for me.
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### Author:  [@jnettlet](https://community.solid-run.com/u/jnettlet)
#### Post date: [August 17, 2021, 8:06am UTC](https://community.solid-run.com/t/cubox-m-not-boot/139/2 "2021-08-17T08:06:29Z")
The specification of the device is encoded in sku. You can use this page to decode that information, [SolidRun SKU Guide | SolidRun](https://developer.solid-run.com/knowledge-base/solidrun-sku-guide/)
Can you please message me in private your order number so we can reference the models that you have purchased in our database? Thanks.
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### Author:  [@Checker](https://community.solid-run.com/u/Checker)
#### Post date: [August 18, 2021, 6:08am UTC](https://community.solid-run.com/t/cubox-m-not-boot/139/3 "2021-08-18T06:08:08Z")
Thank you very much for the Guide. Now I can identify the device. As soon as I get the order number from my boss I will send it.
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### Author:  [@codealot](https://community.solid-run.com/u/codealot)
#### Post date: [August 26, 2021, 8:26am UTC](https://community.solid-run.com/t/cubox-m-not-boot/139/4 "2021-08-26T08:26:45Z")
Hi there,
I have the same problem, nothing on hdmi. Just got a couple of iMX8MP CuBoxes and flashed sr-imx8-debian-bullseye-20210706-cli-imx8mp-sdhc-cubox-pulse onto an sd card as per the guide.
I can ssh on to the devices over USB but there is no hdmi output. Using tools like xrandr I always get the error “Can’t open display”. And although there is a mini-hdmi port somewhere in /sys/platform, it seems there isn’t any actual display or hdmi device.
Any suggestions ?