RPI 4B power supply issue
March 26, 2024, 10:38
Hello, I recently ran into trouble with my RPI 4B. It worked fine for a while, I took it out of the case for the time being as I was waiting for a better case to arrive. My hand bumped into the pi while it was running and it looked like it was going to reboot. After waiting a while and restarting it manually a few times, the pi does not seem to boot. Both the red LED and the green ACT LED stay on constantly once power is connected. I tried starting with nothing connected but the power cable, however the problem did not seem to go away. I thought maybe the bootloader was corrupt but that also does not seem like the issue. Any advice on what I can do to troubleshoot this pi?
Where the hell did you touch it for that? My pi definitely doesn't have that issue, I can touch it wherever I like and not cause a short circuit or anything
Do you have a display and micro hdmi cable?
I have no clue how it happened either, it was a slight bump which should not have affected it at all. I have never had this issue with any other pi so it is really weird.
Yes I do have a display and microhdmi, but I just get no hdmi signal
Didn't fall? I mean maybe something like a capacitor fell off
Or are you extra conductive lol
Nope, did not fall or something. I had it on top of the (old) case that in was in before.
I like to do absolutely everything from the start to rule everything out, are you ok with that? It is some effort
I tried booting with a different cable, no luck with that either. I checked if there were any bent pins or a short somewhere else but there is nothing that catches my eye
Completely fine! I am running out of options to try so would like to see if I covered everything haha
Ok first grab your SD card and go into the imager and select "erase" in the os section
Assuming you have an up to date imager
I have a <#1193641764330946741> on this if you need a step by step instruction but I think you can handle it
Okay will get it checked out, I will check the faq if I get stuck but should be fine :)
But wouldn't it boot without any sd card inserted? For the other pis it just shows that there is no sd card inserted (I do get hdmi signal for those)
https://discord.com/channels/818384379197784084/1193923435789824050 just instead of selecting "raspberry pi os 32 bit" select "erase".
Should do but sometimes people don't on here, i might be thinking of something else but it's always worth a shot to me
Okay I will try it as soon as I am home
Sure
ESD (Electrostatic Discharge) can damage electronics and its sneaky it can cause damage thet will kill your electronics , now or within a day or week or years from now.
So NEVER touch exposed electronics!
And because you could touch it now and nothing happen isn't a proof that nothing has been damaged!
great to know and i wish i knew that sooner
I can show you that with a nylon stoking and a wool scarf...
Hello sorry for late reaction
I just erased and gonna try to boot up the pi with the sdcard now
Have you then put an os on it again?
Gonna do that rn
https://discord.com/channels/818384379197784084/1193923435789824050 I mean just glance over this again so I can make sure your doing it properly
Yep I have settings that I used on my other pi's
So writing to the card rn
I wrote the image to card in the correct manner
But when powering it up it still does not do anything different
Both leds instantly go on and they remain constant without flashes
Display?
No hdmi signal
Then dead pi
Actually no
As a last ditch effort you can try a usb. You have a usb at 4GB or more?
I can check if I have one
Do not seem to have a spare one I could use for this
Is there any other check I can do, by measuring voltage across the gpio pins for example?
Not really
Other than that, it's dead.
And there is no way to fix it?
How do I know __what__ is dead?
Well unless your a magician or incredibly smart person (further than me) it's dead. So no point figuring out what exactly is dead
If oops.se is right it's this