Questions tagged [pi-400]
For questions that apply specifically to the Raspberry Pi 3 and not other/all models.
19 questions
0 votes
1 answer
54 views
RPi 400 did NOT boot, Green LED blinks twice and off
RPi 400 did NOT boot, Green LED blinks momentarily twice, no response on HDMI or Serial (UART) Console. EDIT: The MicroSDCard works fine with OTHER RPi 400, meaning HDMI Cable &/ Serial (UART) ...
- 121
0 votes
0 answers
34 views
Raspberry-pi minature cooling fan enquiry
I’m a student working on a Raspberry Pi 400 project, and I have a miniature 5V cooling fan connected through a breadboard. Right now, the fan runs as soon as the Pi is powered on, but I want it to ...
0 votes
1 answer
973 views
Raspberry Pi 400 Boot Failure: "failed to open device 'SDCARD'"
Encountered Error: The Raspberry Pi 400 displays the following error message upon boot: failed to open device 'SDCARD' cmd 371a010 status 1fff00001 Background: I used the official Raspberry Pi Imager ...
0 votes
0 answers
287 views
Raspberry pi 400: no sound through HDMI
I've got a karaoke system with an hdmi input and an hdmi output. It works perfectly when connecting the input to a video player or a computer, but when connected to my pi, the image go through HDMI, ...
- 153
-1 votes
1 answer
194 views
Make sure that RPi 400 clock is always synced
tl;dr Exactly what steps must a newbie like me undertake to configure RPi 400 in the way that it obtains current time from some official NTP server every time it boots up? I am just trying my first ...
- 141
-1 votes
1 answer
257 views
Can the Raspberry Pi 400 run on a 12 volt battery?
I have powered my Pi 3s and 4s successfully via 12 volts with various battery packs. I'm trying to do the same with the PI400. Has anyone successfully powered the Pi400 via 12v and if so, how?
- 1
0 votes
1 answer
2k views
OpenCL on rPi 400
I have an rPi 400 running Raspbian (Debian GNU/Linux 11.) If I run clinfo on it, I see 0 platforms. I have no /etc/vendor/ directory either. How do I run OpenCL on my rPi400?
- 172
0 votes
0 answers
206 views
raspberry pi wont show the desktop
my raspberry pi 400 does not show the desktop even after reflashing the sd card. the ttys work fine. when i reflash the sd card the setup page will shw and i will be able to set it up and reboot. when ...
-2 votes
1 answer
275 views
Why does Raspberry Pi 400 use white color (and not black) for its USB 2.0 port?
On a quick look up, it seems the general trend is white for USB 1.0 and black for USB 2.0. I also glanced through the USB 2.0 specification to try find anything relevant but it seems a bit ...
- 115
1 vote
1 answer
112 views
DS18B20 not showing up Pi 400
I have a raspberry pi 400 running ubuntu server. I have a DS18B20 with a 4.7k resistor connected from the power to the data wire. I boot up the pi and run the sudo modprobe w1-gpio and sudo modprobe ...
- 34
1 vote
1 answer
549 views
Raspberry pi 400 HDMI audio problem with Bullseye [closed]
I see there is another question about HDMI audio on here but I have a permutation of it so I ask my question as well. I've tried everything to get HDMI audio on my pi400 working properly. I think it's ...
- 11
0 votes
1 answer
623 views
Peer-to-peer networking with ethernet
I had an idea for transferring data between Pi's. It involves directly connecting two Pi's to each other only using a single cat5 ethernet cable, and transferring data in a peer to peer manner. I have ...
- 1
0 votes
0 answers
133 views
Can I install os on Pi 400 without sd card reader?
I've been having problems installing an OS onto my Raspberry Pi 400 as I don't have an SD card reader, I've seen previous posts along these lines but none of them specify if I can do this with a ...
- 1
3 votes
1 answer
660 views
Pi 400 key cap replacements [closed]
I ordered 6 raspberry pi400s for my class of elementary school students a couple of months ago. Already some of the key caps have broken off and I’m sure this is going to continue. I’m looking for the ...
- 31
-1 votes
1 answer
659 views
Sense HAT stuck on Rainbow test, will not show any blue light in normal RGB
I am new to this, and my Sense HAT is stuck on a rainbow setting and only shows Red and green, instead of Red, Green, and Blue. I have a Raspberry Pi 400, an Acer monitor, and I am using a 40 pin ...
- 11