25
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.
- 461
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 ...
- 41.7k
15
votes
Accepted
Boot from USB with a Raspberry Pi 4B that apparently has a broken SD card reader
It is certainly possible to avoid using the SD card for boot - none of my Pi devices use the unreliable SD card interface and all boot either from the network or an SSD via the USB port.
Boot order
...
- 2,720
14
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 ...
- 196
13
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 ...
- 231
10
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 ...
- 1,581
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 ...
- 70.4k
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 ...
- 58.3k
6
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 ...
- 181
6
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 ...
- 61
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 ...
- 20.7k
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 ...
- 70.4k
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 ...
- 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 ...
- 58.3k
5
votes
Accepted
How to disable OpenVPN from running at startup on Raspbian?
If you are using jessie, check:
systemctl list-units | grep vpn
You should be able to find the name of the service this way (wild guess: openvpn), then:
sudo systemctl disable openvpn
That won't ...
- 58.3k
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 ...
- 895
5
votes
Accepted
Is it possible to use partition UUID for root-parameter in cmdline.txt?
It seems with the current bootloader it's not possible to use partition UUID as kernel boot parameter for the root device. As suggested in the comment I tried booting with the device name /dev/...
- 41.7k
5
votes
Windows 10 Iot Core Will Not Boot
Updated:
Overtime a lot changes have been happened, this means the Original Answer might now works for newer images. There fore the work around is
Download and install Windows 10 IoT Core Dashboard
...
- 151
5
votes
Green LED blinking 7 times with rainbow colour image on screen
According to R-Pi Troubleshooting with 7 flashes of the green led the kernel.img is not found. I do not have any experience with android things but in general the Raspberry Pi boot loader expects its ...
- 41.7k
5
votes
Raspberry Pi 3b+ not booting
Read it again: The Boot Problems Sticky it covers 99.999% of reasons your RPi won't boot.
Then download plain Raspbian and https://etcher.io and use Etcher to rewrite your SDCard. It's highly likely ...
- 5,251
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.
...
- 1,329
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 ...
- 70.4k
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 '...
- 99
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 ...
- 51
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 ...
- 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.
- 7,116
4
votes
Changed the fstab file, now stuck in a reboot loop
I'm assuming you have full-size personal computer to work on, otherwise where would your share be connected to! So..., can you mount and read the SDHC card from the Pi on that PC? If you think you ...
- 3,621
4
votes
Accepted
Cant login to rasberrypi
Assuming you are running Raspbian. The username is pi and the password is raspberry.
- 34.5k
4
votes
Unable to boot with RPi2 from a USB stick
The Raspberry Pi 3 will be able to boot from PXE, although this is not yet available. The references to USB boot were a misinterpretation of the writeup in the MagPi.
The Raspberry Pi 2 can do ...
- 58.2k
4
votes
Accepted
How can I install the KUMAN 3.5 inch-display?
Here are the drivers and the description of how to install the screen given by Kumantech. I got it working, and touch screen functionality also worked. I actually did this with combination with other ...
- 168
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