30 votes
Accepted

Raspberry Pi with boots up with Rainbow screen

Do you mean a screen like this?: If you using a RPi 3 B+, it may just be out of date firmware (see here) - you need to use newer image with the right firmware such as the offical Raspbian image - ...
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  • 2,483
23 votes
Accepted

NOOBS stuck at rainbow screen - Raspberry Pi 4

I connected it to the other HDMI port and the image appeared, it was actually booting but showing the rainbow through that port.
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16 votes
Accepted

Why am I getting a rainbow screen and flashing red PWR LED with a new Raspberry Pi 3B+?

I've made this answer to summarize the experience to this issue. We are talking about Raspberry Pi 3 Model B+, released on 2018-03-14. It has some new and updated features compared to Raspberry Pi 3 ...
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  • 40.1k
12 votes

Strange problem on startup - cannot open access to console

Found myself in the same situation just now. Took quite some time to figure out (taking into account that I had neither a USB keyboard nor a Linux computer around this was a long quest). The reason ...
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  • 221
12 votes
Accepted

Ubuntu server on RPI 4 boot hangs on cloud init

I had the exact same issue on a P3 - tried different ISOs but no joy I was able to fix by disabling cloud init via ssh. 1) get the IP address of the Pi - I was at home so just logged onto my router ...
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11 votes
Accepted

Install Arch Linux from osx

I just ran into this issue myself. I found two ways to create the SD card using the .tar.gz images provided by ArchLinuxARM, provided you have a USB SD card reader. Method 1: Raspberry Pi + USB card ...
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9 votes

isc-dhcp-server needs to be restarted after reboot

The reason why the ISC DHCPv4 server service fails is that at the time it is started the network interface configuration might not have been finished. As systemd cannot know when a service really has ...
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  • 1,541
8 votes

Binary garbage on the UART when powering the RPi

The Pi's UART has a fault (in the firmware). Whenever the port is opened there is a 30 µs low glitch on TXD. See http://elinux.org/RPi_Serial_Connection#Unwanted_serial_garbage_input and search for ...
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  • 67.4k
7 votes
Accepted

Why did my Pi die?

From Wikipedia: Overclocked use may permanently damage components enough to cause them to misbehave (even under normal operating conditions) without becoming totally unusable. [...] In ...
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  • 56.1k
6 votes

Powering Raspberry Pi via battery pack and buck converter - how to solve low voltage reboot issues

You've not explained or shown how you have your batteries arranged, nor provided any specs on them. But it seems likely they are in series - thereby providing ~ 9V output. Batteries in series can ...
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  • 18.3k
5 votes
Accepted

Disabling rainbow splash screen does not work

You have edited the wrong file; disable_splash=1 should be in /boot/config.txt.
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5 votes

Raspberry pi B+ first boot

Finally I found the problem that is my power supply. It is not 5V output it is around 6.8V that is why color screen after that load some cord and it load again and again. If you find how to check ...
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  • 189
5 votes
Accepted

Recover pi 2 from wrong kernel build?

All the boot files are on a FAT32 sector, which is readable and writeable by all common operating systems. You can place the SD card in an SD card reader, delete the bad kernel, and rename the good ...
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  • 67.4k
5 votes

Window IoT Core stuck while booting on Raspberry Pi 3

I had this problem too, it never got past that boot screen. It turned out it was a power supply problem. Pi 3 requires 2 A, and I had a 1.5 A micro USB adapter. When I switched to a 2 A adapter it ...
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  • 51
5 votes
Accepted

Ext4-FS error on Raspberry Pi randomly

The filesystem appears to be getting corrupted repeatedly, and from the sounds of things, that includes while the system is running and not just between boots, which is when it is most likely to occur ...
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  • 56.1k
5 votes

Raspberry Pi 1 Model B+ end of life?

The rainbow square is an under-voltage warning. You might consider upgrading to a more powerful power supply (more amps, not more volts). EDIT To further answer your question I have tried to ...
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  • 875
5 votes
Accepted

How to reboot my Raspberry Pi after wrong edition of my fstab?

Since I found the solution myself, I am posting it here, very grateful to every author of the raspberry pi forum posts. 1. Part 1 - getting command line in the boot Error Got "Cannot open access to ...
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  • 171
5 votes
Accepted

RPi won't boot after editing fstab

If you want to edit files on the root partition, an easy way is to download some Linux distribution (Ubuntu for example) flash it to an USB stick and boot from it. Here is a tutorial how to do it. ...
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  • 1,119
5 votes

No activity LED after shorting a GPIO to ground : dead or fixable?

I don't see that connecting pin 40 (GPIO21, aux SPI SCLK) to ground would have any bad effect. Most GPIO are set as inputs. Connecting an input mode GPIO to ground or 3V3 is normal operation and has ...
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  • 67.4k
5 votes

Booting Alpine linux on Raspberry Pi 4

You can get the Raspberry Pi 4 to boot with Alpine Linux 3.10.2 by adding the following two files into the FAT32 (boot) partition: start4.elf and fixup4.dat. They can be obtained from the official ...
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  • 51
5 votes

One volume does a *full* fsck every boot, even though it's clean

I found what I believe was the cause, and it now appears to be fixed. Since this machine has a battery-backed RTC on it, fake-hwclock had been uninstalled long ago. When looking at the dump from '...
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5 votes

NOOBS stuck at rainbow screen - Raspberry Pi 4

Try plugin your display to the other port. I spent an hour to figure out that my display was not on the primary display port and the secondary port was showing rainbow. Switched my display to primary ...
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4 votes

Raspberry Pi with boots up with Rainbow screen

For me, inserting boot_delay=1 into config.txt did not work. Running fsck on the boot partition (/dev/mmcblkop1) uncovered file corruption which couldn't be auto-fixed. I ended up deleting the ...
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  • 141
4 votes
Accepted

How to enable or fix the TTL console connection on the Raspberry Pi?

How to get the TTL console working on the Raspberry Pi STEP 1Edit /boot/cmdline.txt and make sure you have the following: dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=...
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  • 171
4 votes
Accepted

Raspberry Pi does not start up, green LED flashes 2 times

Just to put in answer form. Per official raspberry pi site, the dd command should be dd bs=4M if=2014-09-09-wheezy-raspbian.img of=/dev/mmcblk0 Edit: obviously changing image name to that of your ...
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  • 591
4 votes
Accepted

make boot disk on disk with failed sectors?

Once an SD card starts producing errors I believe it is defunct. They generally use a methodology called wear levelling (apparently often via a 32-bit ARM microcontroller) to maximize their lifespan....
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  • 56.1k
4 votes

What does it mean if both LEDs are lit up?

I faced a similar issue and the problem ended up being my SD card. I also had no display and the similar red and green light issue. To rectify, I configured my SD card to Raspbian using ...
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  • 402
4 votes

Error installing OS with Noobs

From what you have stated I would look for a power issue. If you have a poor power supply it can cause your SD card to get corrupted. Look for the rainbow icon in the upper right. You can re-image ...
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  • 664
4 votes
Accepted

Is my raspberry Pi dead

It's dead. It should have been okay if the board was completely silent (blown polyfuse, wait a few hours) but you mentioned that the SOC heats up immediately. Therefore, it's most probably dead.
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  • 7,038

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