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My Rpi 4 doesn't see the SD-card. I have switched SD-cards, formatted them all correctly. Also used both Raspian and Noobs. Nothing helps because it does not see the cards.

Every 'solution' on the internet says to reboot, using the SD-card. Is it possible to reboot, without a SD-card in the process.

Sometimes the green light is not on. Other times it is constantly on. But it never flashes or react to anything...

I have been trying different codes, programs and fora. But everything includes an SD card in the process. Please help.

Note: The Pi worked fine and ran RetroPie for a few days. One morning it just doesn't read the SD anymore ...

Thanks in advance!

Maurice L
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2 Answers2

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To troubleshoot your boot problems I would do the following steps in that order:

  1. If possible check if your SD Cards boot in another Raspberry Pi 4B.
  2. Work through the The Boot Problems Sticky.
  3. It may be possible that the SPI EEPROM has become corrupted. But it is possible to recover it. How to do it you will find a step by step guidance at Downloads in section Recovery.
  4. You can enable the serial debug console to get messages from the bootloader. For this you need an USB to TTL serial adapter. For further information about this you can look at What is the correct way to connect serial console on RPi4 Model B?.
  5. If you have the serial console running, then you can enable the debug messages from the bootloader with Serial output in case of no OS. As noted there you will find a step by step guidance how to enable the serial debug output of the bootloader on the UART. Have a look at Pi4 Bootloader Configuration just at the beginning.
Ingo
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I was with the same problem. I fixed it by resoldering the pins of the sd slot. I think it's a ploblem of cold solder. You'll have to touch each pin with the soldering iron for 3 seconds approximately. I hope you can fix it too.

Vinicius Mainardi
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