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My raspberry pi 4 was in normal use yesterday, but didn't boot today:

I am using the Pi4, suddenly it does not boot into the memory card anymore, only the red light (power light) does not light the memory card reader light (green light). The usb ports also lose the signal. When i boot OS Raspbian (from this link: https://www.raspberrypi.org/software/op ... -os-32-bit), my display not signal, all is black. When I use "Raspberry Pi 4 EEPROM boot recovery" but display is red, not green. I see this link (https://www.raspberrypi.org/documentati ... booteeprom) I checked the GPIO pin and found still 3.3V and 5V, UART still works with random bit characers. I think I had a problem with my bootloader, because if I don't boot to OS but boot recovery then the SD slot is still working. I am still a student, throwing away and buying new is a very difficult decision. Please help me. Thank you everyone <3

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    The SD Card is probably corrupted. Just restore from your backup. – Milliways Apr 26 at 4:54
  • from this link - not a valid link – Jaromanda X Apr 26 at 6:04
  • Hi Milliways, how to restore from my backup? – Nguyen Van Tai Apr 26 at 9:52
  • Hi Jaromanda X, i can't see that link? – Nguyen Van Tai Apr 26 at 9:53
  • Depends how you backed up. Generally you just use the same installer you used initially. Most backup tools create an image of the installation. – Milliways Apr 26 at 11:57
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This might be an issue if the OS is corrupted..

I suggest you to install the OS using Raspberry Pi Imager

The imager formats the SD card for you and writes the OS to it automatically, you can look at this video from Raspberry Pi which has the step by step process for installing.

You can download it from here: https://www.raspberrypi.org/software/


If re-installing the OS also does not work, it might be a display issue.

For that, remove your SD card and put it in a laptop, after that open the Boot drive (Windows may prompt you to format the card but don't do it).

After that, open the config.txt file and add this at the end of the file:

hdmi_force_hotplug=1

adding the line hdmi_force_hotplug=1 forces the rpi to display in HDMI even if no HDMI is detected.

Now your rpi must work :)


If that also doesn't work, then the bootloader must be corrupted..

You can refer this page which gives info on downloading the bootloader: https://www.element14.com/community/community/raspberry-pi/blog/2019/10/21/my-raspberry-pi-4-does-not-boot

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  • I install the OS many times, but don't work for pi – Nguyen Van Tai Apr 26 at 9:55
  • @NguyenVanTai I have updated the answer, check if this helps in any way :) – 404 - Brain Not Found Apr 26 at 11:53
  • When I use "bootloader" in this link, my green led flashes on off 4 times a cycle. Next, I used an SD card that contained the OS, nothing happened. – Nguyen Van Tai Apr 27 at 3:08

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