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RaTTuS
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Re: Pi3 with a lightning bolt?

Fri Jul 21, 2017 7:35 am

are you powering the display though the PI or the PI though the display
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Re: Pi3 with a lightning bolt?

Fri Jul 21, 2017 10:03 am

How To ask Questions :- http://www.catb.org/esr/faqs/smart-questions.html
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Joshua_RC
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Re: Pi3 with a lightning bolt?

Fri Aug 11, 2017 5:26 pm

This is my first post to the forum so I apologize in advance if this is the wrong place to post.

I was also running into the problem of the lightning bolt showing up. My configuration is the official raspberry pi display with a raspberry pi 3. I am not using an official power supply. I have 1 power supply that are 'supposed' to be able to source 3 amps. My intention is to run both the pi and the display off of this 1 power supply. I have been able to run this same configuration with a PI 2. I found that with the PI 3 configuration, I did not get the lightning bolt when I used 2 supplies, one for the display and one for the PI3. Due to this, and that the lightning bolt indicates a brown out, I am experimenting with the following:
1. I have ordered a 3.5 Amp supply.
2. Looking at the schematic, I have also increased the capacitance for parts C3, C4, C7, and C8. I chose to do this since from what I can tell, the Pi's processor does not see the +5V directly. Also, it appears that the display connector does not have any capacitance near it. The values that I chose were 22uF low esr X5R parts that I placed on top of the existing capacitors.
The results so far seem to be promising. Since I have implemented change #2 I have not seen the lightning bolt. It is quite possible that not all of the capacitors are needed. Further testing will have to be done to figure that out.
PLEASE NOTE - since this is a modification to the actual PI board, I am pretty confident that it invalidate any warranty! I chose to do this since I needed my PI for some testing at work. Proceed at your own risk!

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Re: Pi3 with a lightning bolt?

Sat Aug 12, 2017 10:58 am

power the RPi from the display an dpower the display with a good PSU IIRC that is the best way
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DirkS
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Re: Pi3 with a lightning bolt?

Sat Aug 12, 2017 11:07 am

RaTTuS wrote:
Sat Aug 12, 2017 10:58 am
power the RPi from the display an dpower the display with a good PSU IIRC that is the best way
Nope. Other way around.

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Re: Pi3 with a lightning bolt?

Sat Aug 12, 2017 7:48 pm

i-Moi wrote:
Wed Jun 21, 2017 11:09 am
... does anyone has an idea about longer but still good quality cables ? Thanks !
viewtopic.php?f=63&t=165393
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Re: Pi3 with a lightning bolt?

Sun Aug 13, 2017 8:34 am

DirkS wrote:
Sat Aug 12, 2017 11:07 am
RaTTuS wrote:
Sat Aug 12, 2017 10:58 am
power the RPi from the display an dpower the display with a good PSU IIRC that is the best way
Nope. Other way around.
my bad ... failing memory :oops:
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pfaure
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Re: Pi3 with a lightning bolt?

Mon Oct 16, 2017 11:04 pm

UPDATE:
2017-10-18: I found out why the PI was booting, the Kernel was corrupted in last update. This doesn't explain why the lightning bolt exists now with out a change in the configuration. Voltage onboard is 4.9V.

I have a RPI 3 with the 7" display. I was running the unit with a build from May of this year. I have been using an ATX Power supply to provide the 5V. I have not had ANY issues.

After I did the apt-get upgrade two nights ago, I got the normal boot (including the "Shift" for new installs), then a black screen with the lightning bolt, then it goes away. the nothing happens. Network doesn't start work, so I can't even connect to the unit using SSH.

So, last night, I re-installed from scratch. I had no issues, (install dnsutils, kivy, without issues, then I re-ran the the upgrade again the following were updated. I ran these following updates, and got the same error again. Here is the last set of versions that seems to be causing me issues.

I have even tried to disconnect the power from the display to see if it is truely a power related issues, and the PI still doesn't respond to SSH. Since now based on the flashing lights sequence, (7 flashes), it would seem that the "kernel.bin" isn't present.

Since I get get into the Kernel, I will have to build the unit again from scratch.

I hope that the information below can help someone find out what is going on, so that others dont' have the same issue.

[email protected]:~$sudo aptitude upgrade
Resolving dependencies...
The following NEW packages will be installed:
device-tree-compiler{a} point-rpi{a} rpd-icons{a} rpd-plym-splash{a} rpd-wallpaper{a}
The following packages will be upgraded:
bluej greenfoot libraspberrypi-bin libraspberrypi-dev libraspberrypi-doc libraspberrypi0 libruby2.1 lxkeymap policykit-1 poppler-utils
python-gpiozero python-picamera python-pil python-rpi.gpio python-sense-hat python3-gpiozero python3-picamera python3-pil
python3-rpi.gpio python3-sense-hat raspberrypi-bootloader raspberrypi-net-mods raspberrypi-ui-mods raspi-config raspi-gpio rc-gui ruby
ruby2.1 sonic-pi sudo unzip va-driver-all wireless-regdb wpasupplicant xarchiver
The following packages are RECOMMENDED but will NOT be installed:
p7zip-full raspberrypi-kernel
35 packages upgraded, 5 newly installed, 0 to remove and 2 not upgraded.
Need to get 0 B/143 MB of archives. After unpacking 18.0 MB will be freed.
Do you want to continue? [Y/n/?] y
Extracting templates from packages: 100%
Selecting previously unselected package point-rpi.
(Reading database ... 135286 files and directories currently installed.)
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Created symlink from /run/systemd/system/polkitd.service to /dev/null.
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Unpacking ruby2.1 (2.1.5-2+deb8u3) over (2.1.5-2+deb8u2) ...
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Unpacking bluej (3.1.7b) over (3.1.6) ...
Selecting previously unselected package device-tree-compiler.
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Unpacking greenfoot (2.4.2a) over (2.4.2) ...
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Preparing to unpack .../raspberrypi-bootloader_1.20170703-1_armhf.deb ...
Adding 'diversion of /boot/start.elf to /usr/share/rpikernelhack/start.elf by rpikernelhack'
Adding 'diversion of /boot/start_cd.elf to /usr/share/rpikernelhack/start_cd.elf by rpikernelhack'
Adding 'diversion of /boot/start_db.elf to /usr/share/rpikernelhack/start_db.elf by rpikernelhack'
Adding 'diversion of /boot/start_x.elf to /usr/share/rpikernelhack/start_x.elf by rpikernelhack'
Adding 'diversion of /boot/fixup.dat to /usr/share/rpikernelhack/fixup.dat by rpikernelhack'
Adding 'diversion of /boot/fixup_cd.dat to /usr/share/rpikernelhack/fixup_cd.dat by rpikernelhack'
Adding 'diversion of /boot/fixup_db.dat to /usr/share/rpikernelhack/fixup_db.dat by rpikernelhack'
Adding 'diversion of /boot/fixup_x.dat to /usr/share/rpikernelhack/fixup_x.dat by rpikernelhack'
Adding 'diversion of /boot/bootcode.bin to /usr/share/rpikernelhack/bootcode.bin by rpikernelhack'
Adding 'diversion of /boot/LICENCE.broadcom to /usr/share/rpikernelhack/LICENCE.broadcom by rpikernelhack'
Unpacking raspberrypi-bootloader (1.20170703-1) over (1.20160225-1) ...
Preparing to unpack .../python-gpiozero_1.4.0_all.deb ...
Unpacking python-gpiozero (1.4.0) over (1.1.0) ...
Preparing to unpack .../python-picamera_1.13_armhf.deb ...
Unpacking python-picamera (1.13) over (1.10-1) ...
Preparing to unpack .../python3-gpiozero_1.4.0_all.deb ...
Unpacking python3-gpiozero (1.4.0) over (1.1.0) ...
Preparing to unpack .../python3-picamera_1.13_armhf.deb ...
Unpacking python3-picamera (1.13) over (1.10-1) ...
Preparing to unpack .../raspberrypi-net-mods_1.2.5_all.deb ...
Unpacking raspberrypi-net-mods (1.2.5) over (1.2.1) ...
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Unpacking raspberrypi-ui-mods (1.20170516) over (1.20160202) ...
Preparing to unpack .../sonic-pi_1%3a2.11.0-0_armhf.deb ...
Unpacking sonic-pi (1:2.11.0-0) over (1:2.9.0-1) ...
Processing triggers for dbus (1.8.22-0+deb8u1) ...
Processing triggers for man-db (2.7.5-1~bpo8+1) ...
Processing triggers for systemd (215-17+deb8u7) ...
Processing triggers for gnome-menus (3.13.3-6) ...
Processing triggers for desktop-file-utils (0.22-1) ...
Processing triggers for mime-support (3.58) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Setting up point-rpi (0.20160905) ...
Setting up policykit-1 (0.105-15~deb8u2) ...
Removed symlink /run/systemd/system/polkitd.service.
Setting up poppler-utils (0.26.5-2+deb8u1) ...
Setting up python-pil:armhf (2.6.1-2+deb8u3) ...
Setting up python-rpi.gpio (0.6.3~jessie-1) ...
Setting up python-sense-hat (2.2.0-1) ...
Setting up python3-pil:armhf (2.6.1-2+deb8u3) ...
Setting up python3-rpi.gpio (0.6.3~jessie-1) ...
Setting up python3-sense-hat (2.2.0-1) ...
Setting up raspi-gpio (0.20170105) ...
Setting up raspi-config (20170705) ...
Installing new version of config file /etc/init.d/raspi-config ...
insserv: warning: script 'Filler' missing LSB tags and overrides
insserv: warning: script 'Filler' missing LSB tags and overrides
Setting up lxkeymap (0.8.0~bzr25-1+rpi3) ...
Setting up rc-gui (1.9) ...
Setting up rpd-icons (0.8) ...
gtk-update-icon-cache: Cache file created successfully.
Setting up rpd-plym-splash (0.11) ...
update-initramfs: deferring update (trigger activated)
Setting up rpd-wallpaper (0.4) ...
Setting up libruby2.1:armhf (2.1.5-2+deb8u3) ...
Setting up ruby2.1 (2.1.5-2+deb8u3) ...
Setting up ruby (1:2.1.5+deb8u2) ...
Setting up sudo (1.8.10p3-1+deb8u4) ...
Setting up unzip (6.0-16+deb8u3) ...
Setting up va-driver-all:armhf (1.7.3-2) ...
Setting up wireless-regdb (2016.06.10-1~deb8u1) ...
Setting up wpasupplicant (2.3-1+deb8u4) ...
Setting up xarchiver (1:0.5.4-1+deb8u2) ...
Setting up bluej (3.1.7b) ...
Setting up device-tree-compiler (1.4.1-1+rpi1) ...
Setting up greenfoot (2.4.2a) ...
Setting up raspberrypi-bootloader (1.20170703-1) ...
Removing 'diversion of /boot/start.elf to /usr/share/rpikernelhack/start.elf by rpikernelhack'
Removing 'diversion of /boot/start_cd.elf to /usr/share/rpikernelhack/start_cd.elf by rpikernelhack'
Removing 'diversion of /boot/start_db.elf to /usr/share/rpikernelhack/start_db.elf by rpikernelhack'
Removing 'diversion of /boot/start_x.elf to /usr/share/rpikernelhack/start_x.elf by rpikernelhack'
Removing 'diversion of /boot/fixup.dat to /usr/share/rpikernelhack/fixup.dat by rpikernelhack'
Removing 'diversion of /boot/fixup_cd.dat to /usr/share/rpikernelhack/fixup_cd.dat by rpikernelhack'
Removing 'diversion of /boot/fixup_db.dat to /usr/share/rpikernelhack/fixup_db.dat by rpikernelhack'
Removing 'diversion of /boot/fixup_x.dat to /usr/share/rpikernelhack/fixup_x.dat by rpikernelhack'
Removing 'diversion of /boot/bootcode.bin to /usr/share/rpikernelhack/bootcode.bin by rpikernelhack'
Removing 'diversion of /boot/LICENCE.broadcom to /usr/share/rpikernelhack/LICENCE.broadcom by rpikernelhack'
Setting up libraspberrypi0 (1.20170703-1) ...
Setting up libraspberrypi-dev (1.20170703-1) ...
Setting up libraspberrypi-doc (1.20170703-1) ...
Setting up libraspberrypi-bin (1.20170703-1) ...
Setting up python-gpiozero (1.4.0) ...
Setting up python-picamera (1.13) ...
Setting up python3-gpiozero (1.4.0) ...
Setting up python3-picamera (1.13) ...
Setting up raspberrypi-net-mods (1.2.5) ...
Setting up raspberrypi-ui-mods (1.20170516) ...
Installing new version of config file /etc/xdg/lxpanel/profile/LXDE-pi/panels/panel ...
Installing new version of config file /etc/xdg/lxsession/LXDE-pi/autokey.sh ...
Installing new version of config file /etc/xdg/lxsession/LXDE-pi/autostart ...
Installing new version of config file /etc/xdg/lxsession/LXDE-pi/desktop.conf ...
Installing new version of config file /etc/xdg/openbox/lxde-pi-rc.xml ...
Installing new version of config file /etc/xdg/pcmanfm/LXDE-pi/desktop-items-0.conf ...
Backing up old config files...
/home/pi/.themes/PiX
/home/pi/.config/lxsession/LXDE-pi/desktop.conf
/home/pi/.config/lxsession/LXDE-pi/autostart
/home/pi/.config/lxsession/LXDE-pi/autokey.sh
/home/pi/.config/openbox/lxde-pi-rc.xml
/home/pi/.config/pcmanfm/LXDE-pi/pcmanfm.conf
/home/pi/.config/pcmanfm/LXDE-pi/desktop-items-0.conf
/home/pi/.config/lxpanel/LXDE-pi
/home/pi/.config/gtk-3.0/gtk.css
Setting up sonic-pi (1:2.11.0-0) ...
Enabling /etc/security/limits.d/audio.conf for jackd2
Processing triggers for systemd (215-17+deb8u7) ...
Processing triggers for initramfs-tools (0.120+deb8u3) ...
Processing triggers for libc-bin (2.19-18+deb8u10) ...
Last edited by pfaure on Wed Oct 18, 2017 6:41 pm, edited 1 time in total.

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 24133
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Re: Pi3 with a lightning bolt?

Tue Oct 17, 2017 10:03 am

I'm using the 7" with not problems on the latest code.

Have you tried with the very latest Raspbian download? Or are you using a older base version that you then need to upgrade?
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rishitghosh
Posts: 27
Joined: Thu Dec 21, 2017 7:06 am

Re: Pi3 with a lightning bolt?

Sat Dec 23, 2017 10:45 am

davidcoton wrote:
Fri Jul 21, 2017 7:32 am
My touchscreen and B+ combo needs two cables and a supply with dual output to avoid undervoltage issues.
Can you explain more ?

I have a 5V 2.4A PSU with dual output. I have taken output from one of those and have connected to PI 3, Model B. The 7" touchscreen gets its power via the GPIO pins. I see occasional flashing Yellow lightning bolt.

Are you saying I use both the outputs from PSU - run one of them to the PI & other to the display & disconnect all the GPIO connections ?

rishitghosh
Posts: 27
Joined: Thu Dec 21, 2017 7:06 am

Re: Pi3 with a lightning bolt?

Mon Dec 25, 2017 7:25 am

Ok - so I ran two usb cable from my 5V 2.4A PSU (it has dual output)- one to PI 3, Model B and one to the 7" touchscreen. That fixed the issue. I no longer see the occasional flashing Yellow lightning bolt.

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davidcoton
Posts: 4250
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Location: Cambridge, UK

Re: Pi3 with a lightning bolt?

Mon Dec 25, 2017 8:51 am

rishitghosh wrote:
Sat Dec 23, 2017 10:45 am
davidcoton wrote:
Fri Jul 21, 2017 7:32 am
My touchscreen and B+ combo needs two cables and a supply with dual output to avoid undervoltage issues.
Can you explain more ?

I have a 5V 2.4A PSU with dual output. I have taken output from one of those and have connected to PI 3, Model B. The 7" touchscreen gets its power via the GPIO pins. I see occasional flashing Yellow lightning bolt.

Are you saying I use both the outputs from PSU - run one of them to the PI & other to the display & disconnect all the GPIO connections ?
I'm saying that's what works for me -- YMMV! Happy Christmas.
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Hampers
Posts: 6
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Re: Pi3 with a lightning bolt?

Sun Jan 28, 2018 10:59 am

I am building a project using the official touch screen with a Raspberry Pi A+.
I am making a custom plywood laser cut box, so currently the screen and Pi assembly gets a lot of handling while the components are being fitted and tested.

I noticed the lightning icon to, but then suspected the jump wires provided to link the display adaptor board and the Pi board were quite loose. A slight movement would jiggle the connection and hence the power to the Pi would be unreliable.

So will be securing those wires in the future, maybe the most secure option is to solder them?

Those that are using the touch screen for the first time should be aware of this, although it should be the first thing you suspect rather than any USB cable IMO.

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DougieLawson
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Re: Pi3 with a lightning bolt?

Sun Jan 28, 2018 11:51 am

You MUST solder all connections unless you're using a solderless breadboard.
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Hampers
Posts: 6
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Re: Pi3 with a lightning bolt?

Sun Jan 28, 2018 3:13 pm

Yeah, I have soldered the connections and the lightning icon doesn't show up now.
I was going to do that anyway, I have just done it sooner rather than later!

However a more robust alternative cable/connector to the jumper wires would also work, especially if you might want to reuse the Pi and screen for something else later.

phil1952
Posts: 7
Joined: Sat Sep 01, 2018 3:32 pm

Re: Pi3 with a lightning bolt?

Mon Nov 12, 2018 11:21 am

I also get the lightning bolt symbol. I have 3 rpi3b+ each with a 7in display. One of the rpi3+ is Ok so I've used this one to test.
Ive changed over the power supply (which are all Raspberry Pi power supplies), the 7in displays (which are also the recommended displays) the sd cards and the usb keyboard/mouse. The fault always stays with the 2 rpi3b+ that always shows the symbol. The symbol comes on, on boot up and when using the keyboard/mouse. All the above were purchased via the PI Hut or RS components (UK) with the SD cards having noobs preloaded. I haven't check the voltage as when I did the testing they were on the same socket as when the one that seems to work OK. So unless I've missed something the testing Ive done would suggest the 2 rpi's are different than the 1 that's OK. All 3 have been updated using apt-get update and apt=get upgrade. Any ideas ???? Phil

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Re: Pi3 with a lightning bolt?

Mon Nov 12, 2018 11:34 am

This is the undervoltage warning 8https://www.raspberrypi.org/documentation/confi ... g-icons.md)

Make a simple test: power your 7in screen via a Powerbank (and not from the same power supply as your Raspberry Pi 3B+). Let us know if the lightning bolt is gone.
Btw: what is the curent rating of your PSU?

phil1952
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Re: Pi3 with a lightning bolt?

Mon Nov 12, 2018 12:11 pm

Will try the a power supply direct to the 7in screen. All my PSU's are raspberry stamped and output of +5.1v 2.5amps
Phil

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Re: Pi3 with a lightning bolt?

Mon Nov 12, 2018 12:30 pm

Don't forget with a 3B+ the lightning bolt can be due to old firmware on a plain OS SDCard or an incompatible version of NOOBS.

Check that first with a copy of NOOBS 2.9 or Raspbian 2018-10-09.
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phil1952
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Re: Pi3 with a lightning bolt?

Mon Nov 12, 2018 1:04 pm

Using lsb_release -a tells me version 9.4 is that the latest Noobs is 2.8
Phil

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Re: Pi3 with a lightning bolt?

Tue Nov 13, 2018 10:52 am

Updated to noobs 2.9 with a clean install but didn't make any difference, still got the lightning icon. However using a separate raspberry psi to the 7in screen seems to have solved the problem. Interesting to know why 1 raspberry 3+ is ok without the screen being powered separately and the other 2 aren't ???? Phil

phil1952
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Re: Pi3 with a lightning bolt?

Fri Nov 16, 2018 11:25 am

Anybody recommend a dual output psa please as using 2 power supplies to get rid of the lightning bolt is a bit of a nuisance.
Thanks in advance Phil

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Re: Pi3 with a lightning bolt?

Fri Nov 23, 2018 3:13 pm

This PSU has stopped the lightning icon and so far hasn't blown the RPI up
https://www.amazon.co.uk/dp/B017YW2CKM/ ... 41_TE_dp_1

Aukru Raspberry Pi 3 Charger, 5V 3000mA Power Supply 3A Micro USB Charger for Raspberry Pi 3 Model B /3 B+/ Pi 2 Model B/B+ Plus, Banana pi

Phil

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Re: Pi3 with a lightning bolt?

Fri Nov 23, 2018 3:22 pm

This is the reason I use a 15 amp 5V power supply for up to 5 Raspberry Pi, 15 amps is more than is needed, and the voltage stays quite high enough.

Even though a few days ago I did begin getting the lightning bolt on my RPi 3B even though everything was above 5V (5.0 to 5.12v), then yesterday my RPi 3B died.
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