RPI4 SD Card Reader


Aaron K5ATG
 

Hello all,
I believe that the micro SD card reader on my RPI4 is not working. I put in a brand new SanDisk micro SD card with Raspberry Pi OC on it and it never boots up, just says No Signal on the screen. I can put the same micro SD card in an original pi and it will boot up just fine. 
I have been told to get an SSD system on my RPI4 and it will work just fine. The SSD system boots from a USB. 
I have been looking at how to boot from a USB stick with the RPI 4 without using an SD card. Every place that I have found has you booting from an SD card and once the RPI is operating you change the booting to boot from a USB instead of an SD card. The problem that I am having is that if you need an SD card to tell the RPI to boot from the USB, but if you can't boot with the SD card how can you change it to boot from the USB?
I know on Windows computers you can repeatedly press one of the F buttons and you can get it to boot from a thumb drive. I would like to get my RPI operating somehow to make sure that it works before I invest money into getting a SSD setup. 
Does anyone know how I can boot an RPI4 from a thumb drive to make sure that it works and to set it up to boot from a USB?


 

Have you actually tried it?
Assuming a recent Pi4 or Pi400, you just plug in the USB thumb drive or SSD and it just works. There's nothing to do to tell it to boot from USB.
Ifyou've got an old Pi4 then you might have to upgrade the boot code.

On 07/11/2022 15:24 EST Aaron K5ATG via groups.io <k5atg@...> wrote:

Does anyone know how I can boot an RPI4 from a thumb drive to make sure that it works and to set it up to boot from a USB?

Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366
Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail nigel@... www http://www.ngunn.net


David Ranch
 


To build on what Nigel said, did you download and put this brand new Raspberry Pi OS SD image on the SD card?  There are at least two versions of the Rpi4 which require newer images to boot.   It's possible that your Rpi4's firmware is corrupt so there are guides on how to restore that:

   https://jamesachambers.com/raspberry-pi-4-bootloader-firmware-updating-recovery-guide/

--David
KI6ZHD


On 11/07/2022 12:38 PM, Nigel Gunn, G8IFF/W8IFF wrote:

Have you actually tried it?
Assuming a recent Pi4 or Pi400, you just plug in the USB thumb drive or SSD and it just works. There's nothing to do to tell it to boot from USB.
Ifyou've got an old Pi4 then you might have to upgrade the boot code.

On 07/11/2022 15:24 EST Aaron K5ATG via groups.io <k5atg@...> wrote:

Does anyone know how I can boot an RPI4 from a thumb drive to make sure that it works and to set it up to boot from a USB?

Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366
Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail nigel@... www http://www.ngunn.net







Aaron K5ATG
 
Edited

I attempting to try booting from the USB. 
did you download and put this brand new Raspberry Pi OS SD image on the SD card? Yes I did

I used the Raspberry Pi Imager v1.7.3 and the os I used is Raspberry Pi OS (32-bit) released 2022-9-22


N5XMT
 

How did you flash the image to the SD card?  What image did you use?
You can flash the image to an SSD/USB drive the same way, and just plug it into the Pi4 and it boots from it.
Do you ever get anything on the display?  Do either of the LED's light?


N5XMT
 

What do the red and green LED's do?
Do you get anything at all on the monitor when you connect power?  Also, are you using the micro HDMI connector next to the power connector?  That is the primary display.  And the monitor has to be powered on before you power on the pi


Aaron K5ATG
 

The red and green LED';s flash for a few seconds when it starts up. Then the green LED goes out and the red LED stays on. I am using the correct HDMI connector. The monitor is my television and it is on before power up. The TV screen just says "No Signal" I can unplug this pi and use the same SD card on an older RPI and it boots up just fine with the tv set as the monitor. I did this because I want to make sure that I have the TV set right and it is correctly set up. 


Aaron K5ATG
 

When booting from a USB, which USB port should I use?


 

Doesn't matter. Use the fastest one.

On 07/11/2022 18:11 EST Aaron K5ATG via groups.io <k5atg@...> wrote:


When booting from a USB, which USB port should I use?
Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366
Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail nigel@... www http://www.ngunn.net


Steve Spence
 

might be an insufficient power supply.

Steve Spence, KK4HFJ



On Mon, Nov 7, 2022 at 6:09 PM Aaron K5ATG via groups.io <k5atg=yahoo.com@groups.io> wrote:
The red and green LED';s flash for a few seconds when it starts up. Then the green LED goes out and the red LED stays on. I am using the correct HDMI connector. The monitor is my television and it is on before power up. The TV screen just says "No Signal" I can unplug this pi and use the same SD card on an older RPI and it boots up just fine with the tv set as the monitor. I did this because I want to make sure that I have the TV set right and it is correctly set up. 


David Ranch
 


Hello Aaron,

There can be several reasons why you aren't seeing a display on a TV .  I recommend to read this to see some of the troubleshooting steps:

   https://support.thepihut.com/hc/en-us/articles/360008687257-No-HDMI-output-on-my-Raspberry-Pi-4

--David
KI6ZHD


On 11/07/2022 03:18 PM, Nigel Gunn, G8IFF/W8IFF wrote:

Doesn't matter. Use the fastest one.

On 07/11/2022 18:11 EST Aaron K5ATG via groups.io <k5atg@...> wrote:


When booting from a USB, which USB port should I use?
Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366
Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail nigel@... www http://www.ngunn.net







Aaron K5ATG
 

I'm not getting any progress. When I try to boot from a USB I get nothing but a red LED and the fan running. 
Could someone else please try this with their RPI4? 

Every place I look for instructions requires you to do certain upgrades in the Terminal to get the RPI to boot from a USB. 
I also read that for the older RPI4 you have to go into the Terminal to activate this option but for the newer ones this is already been set up.  


David Donaldson KC30SG / WRCB627
 

I agree with the power supply potential problem. 

I had the same issue myself. 2.5 amp supplies are sometimes not enough. 

What supply are you using?

Easily could be a low voltage or underrated power supply. 

This is a known issue with late model Pi 4’s. 

dave…
KC3OSG


On Mon, Nov 7, 2022 at 6:33 PM Steve Spence <greentrust@...> wrote:
might be an insufficient power supply.

Steve Spence, KK4HFJ



On Mon, Nov 7, 2022 at 6:09 PM Aaron K5ATG via groups.io <k5atg=yahoo.com@groups.io> wrote:
The red and green LED';s flash for a few seconds when it starts up. Then the green LED goes out and the red LED stays on. I am using the correct HDMI connector. The monitor is my television and it is on before power up. The TV screen just says "No Signal" I can unplug this pi and use the same SD card on an older RPI and it boots up just fine with the tv set as the monitor. I did this because I want to make sure that I have the TV set right and it is correctly set up. 

--
dave...
David B. Donaldson
dave@...
443-618-2454

Speak as if you understand from the beginning, you can't take it back. dbd


Aaron K5ATG
 

This RPI4 has worked with this TV since 2020 with no problem it just had a low voltage warning. 
I was planning on getting a new 4 amp RPI power supply when I order the stuff for SSD. 

My funds are very limited and regardless of what people say these Raspberry Pi's are not just $35. I don't want to get into a routine of I have to buy this and it will work, now I should by this and it will work, this new product you have to buy and it will then work.
I keep trying this and that and nothing works.  


David Ranch
 


I get your frustration but the truth is that the Raspberry Pi platforms have been evolving over the years.  In the early days of USB booting, people used to have to program a special bit to enable USB and later PXE network booting.  Those features have been slowly getting enabled by DEFAULT in new boards if a SD card wasn't available on specific platforms.   Fortunately, if you have older versions of various Rpi boards, you usually *can* update them to also support these abilities.  Here is a URL to read about this progression:

   https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#boot-sequence


Btw, depending on the age of your Raspberry Pi 4, it might have the new bootloader diagnostics as well (SD card must be REMOVED):

   https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#boot-diagnostics-on-the-raspberry-pi-4

--David
KI6ZHD


On 11/07/2022 03:40 PM, Aaron K5ATG via groups.io wrote:

I'm not getting any progress. When I try to boot from a USB I get nothing but a red LED and the fan running. 
Could someone else please try this with their RPI4? 

Every place I look for instructions requires you to do certain upgrades in the Terminal to get the RPI to boot from a USB. 
I also read that for the older RPI4 you have to go into the Terminal to activate this option but for the newer ones this is already been set up.  


David Ranch
 


Hello Aaron,

Oh.. that is news to me and maybe something has failed.  Since you were already seeing low voltage warnings. I would start with replacing the P/S.  I've personally seen Rpi power supplies fail and several SD cards fail.  I've also had one Rpi outright just DIE after a few years (I suspect a power spike or an ESD event killed it).  It's hard to expect a lot with long lifetimes from a very inexpensive little computer.

--David
KI6ZHD



On 11/07/2022 03:56 PM, Aaron K5ATG via groups.io wrote:

This RPI4 has worked with this TV since 2020 with no problem it just had a low voltage warning. 
I was planning on getting a new 4 amp RPI power supply when I order the stuff for SSD. 

My funds are very limited and regardless of what people say these Raspberry Pi's are not just $35. I don't want to get into a routine of I have to buy this and it will work, now I should by this and it will work, this new product you have to buy and it will then work.
I keep trying this and that and nothing works.  


N5XMT
 

If you had a low voltage warning, your power supply was going. You need a good power supply first


Aaron K5ATG
 

I think that I have made some progress.
I hooked it to a very crappy HDMI monitor that I got with this RP. Anyway, I powered it up with no SD card and no USB thumb drive. I think that I am in the bootloader diagnostics. It is just a green screen that has some info on the board and every 20 seconds it repeats:
Failed to open device:  'sdcard' 
root HUB port 1 init
USB MSD times out after 20 seconds. 

I think that this is progress but I know not what to do now. 


 

Therefore you need to update the boot code. Unfortunately can't tell you how to do it. I've got a Pi400 and it has alwats booted from either a thumb drive of a USB SSD. In either case, program it with Etcher, dd, or Pi Imager.

I also read that for the older RPI4 you have to go into the Terminal to activate this option but for the newer ones this is already been set up.


David Ranch
 


Do you see that diagnostic screen on your TV?  If not, maybe it's a matter of power draw as different HDMI devices can create different power loading issues.  

If you insert your SD card into your rpi4 when connected to that little HDMI display, do you see anything or does the display remain black?  If it remains black, can you try imaging any other SD cards just to rule out a bad SD card?

Have you tried using the Raspberry Pi imager to write a Raspberry Pi OS image to a USB thumbdrive / ssd /etc and then tried booting off that?  I would recommend to FIRST try booting off the USB2.0 ports just to see if that works.

I would also recommend to see if you can try any other USB-C power supplies.  Maybe one from a more recent generation laptop, etc.  You could try a USB-C cell phone charger brick but you really want to find one that supports at least 5.0volts at 3.0amps or better.

--David
KI6ZHD



On 11/07/2022 04:26 PM, Aaron K5ATG via groups.io wrote:

I think that I have made some progress.
I hooked it to a very crappy HDMI monitor that I got with this RP. Anyway, I powered it up with no SD card and no USB thumb drive. I think that I am in the bootloader diagnostics. It is just a green screen that has some info on the board and every 20 seconds it repeats:
Failed to open device:  'sdcard' 
root HUB port 1 init
USB MSD times out after 20 seconds. 

I think that this is progress but I know not what to do now.