I have a Raspberry Pi 4 with NOOBS. When I try to boot NOOBS it shows the rainbow screen and then freezes. I have limited the possible reasons why it won't boot to either my 32GB card is not formatted correctly or that my Raspberry Pi is broken. So, I am asking "Does NOOBS showing/freezing on the Rainbow screen mean that the microSD card reader is working?".

If you think you can fix my Rainbow screen problem please see this question.

  • 2
    Why do you use NOOBs? It's known to create a lot of trouble. Use plain raspbian instead.
    – framp
    Commented Dec 30, 2019 at 21:43
  • 2
    Don't use noobs, flash 'Raspbian with Desktop' (don't unzip) direct to sd card with Etcher. raspberrypi.org/downloads/raspbian balena.io/etcher
    – CoderMike
    Commented Dec 30, 2019 at 21:44
  • 1
    why do you feel that a failure means that hardware is working?
    – jsotola
    Commented Dec 31, 2019 at 21:18

2 Answers 2


Pi4 Boot Problems Sticky contains detailed troubleshooting steps.

Using NOOBS just makes fault finding harder.

The rainbow screen is due to missing (or obsolete) firmware.

I suggest you use Etcher to install Raspbian to a SD Card (like the vast bulk of us).


If you are using Pi 4, make sure you connect to exact HDMI0 port as shown in the picture. Otherwise, you will see a static rainbow image on the monitor.enter image description here

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