I have a Raspberry Pi 4, when the SD Card is installed, the red LED lights up continuously, and the green LED blinks several times and finally becomes a black screen, when I remove the SD Card, then an error screen appears like Raspberry does not read the SDCARD, I use a 7 inch HDMI screen installed with a pin on the Raspberry Pi

  • what is your specific question? ... please add a focused, answerable question to your post
    – jsotola
    Commented Mar 13 at 15:54
  • It would help if you could describe the blinking. It has meaning to describe the problem.
    – NomadMaker
    Commented Mar 13 at 18:49
  • a 7 inch HDMI screen installed with a pin sounds dangerous, I hope the pin isn't conductive Commented Mar 14 at 5:26
  • I'm going to take a guess that one of the following, in decreasing order of likelihood, has occurred. 1. OS not correctly flashed onto the SD card - 2. faulty or cheap SD card - 3. nothing flashed onto the SD card Commented Mar 14 at 5:30
  • My question is what happened to my raspberry, because when the SD card was installed the RPI didn't continue booting and only displayed a black screen, the green LED blinked about 4 or several times, I couldn't count them. but when the sd card is removed, my raspberry shows an error that there is no sd card on the rpi. That's a sign that my 7 inch HDMI doesn't have a problem because it can still display the error. I have updated the eeprom, is there any possibility of damage to my RPI? Commented Mar 14 at 8:50


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