# Pi 4 Flicking HDMI

**URL:** <https://forums.pimoroni.com/t/pi-4-flicking-hdmi/18205>\
**Category:** Support\
**Created:** [November 14, 2021, 11:58pm UTC](https://forums.pimoroni.com/t/pi-4-flicking-hdmi/18205 "2021-11-14T23:58:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![entozoon](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/entozoon/32/8294_2.png) [@entozoon](https://forums.pimoroni.com/u/entozoon)\
**Post date:** [November 14, 2021, 11:58pm UTC](https://forums.pimoroni.com/t/pi-4-flicking-hdmi/18205/1 "2021-11-14T23:58:55Z")

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Hi there, my Pi 4 just arrived and the display output is flashing and flickering:

[![](https://us1.discourse-cdn.com/flex016/uploads/pimoroni/original/2X/1/13087a9ef70f2ddd9137ef16c72a87ef1ccecd9e.jpeg "Pi 4 Flickering") ](https://www.youtube.com/watch?v=TjRGT3-p8sI)

Has anyone seen anything like it? It’s got a 3A PSU and I can still ssh into the device so it’s not… _not_ working, but can’t get a sensible HDMI output at all even after trying various config options and cables. So strange because it’s stable for a few seconds during the initial boot.

Any ideas, or is it defective? They’re quite pricey at the moment, so I need to get it going or send it back asap really :(

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**Author:** ![alphanumeric](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/alphanumeric/32/2729_2.png) [@alphanumeric](https://forums.pimoroni.com/u/alphanumeric)\
**Post date:** [November 15, 2021, 9:23am UTC](https://forums.pimoroni.com/t/pi-4-flicking-hdmi/18205/2 "2021-11-15T09:23:03Z")

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If you installed Bullseye, try Buster instead. There are a few glitches on the go with Bullseye.