# Failed upgrade to 8.21 on NanoPC T4

**URL:** https://dietpi.com/forum/t/failed-upgrade-to-8-21-on-nanopc-t4/17887
**Category:** Troubleshooting
**Created:** [15 September 2023 15:22 UTC](https://dietpi.com/forum/t/failed-upgrade-to-8-21-on-nanopc-t4/17887 "2023-09-15T15:22:55Z")
**Posts on this page:** 1
**Showing post:** 5

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### Author: ![ivenhov](https://dietpi.com/forum/user_avatar/dietpi.com/ivenhov/32/4632_2.png) [@ivenhov](https://dietpi.com/forum/u/ivenhov)
#### Post date: [15 September 2023 21:11 UTC](https://dietpi.com/forum/t/failed-upgrade-to-8-21-on-nanopc-t4/17887/5 "2023-09-15T21:11:02Z")

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I’ve burned lates dietpi image to sdcard and it does not boot, black screen.  
I did the same using the previous image from [https://dietpi.com/downloads/images/old/DietPi\_NanoPCT4-ARMv8-Bookworm.7z](https://dietpi.com/downloads/images/old/DietPi_NanoPCT4-ARMv8-Bookworm.7z)  
and it starts installation process, visible on the screen.  
It looks to me HDMI output is not working on the new version.  
Is this the same as  
[No HDMI output after 8.21.1 update on Orange Pi 5 - #7 by Pr3259](https://dietpi.com/forum/t/no-hdmi-output-after-8-21-1-update-on-orange-pi-5/17785/7)

Daniel

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