So I got a Raspberry Pi B+ and it worked very well. Some day something happened and the microSD was broken. I checked it using badblocks. Now I got a new microSD and wanted to rearrange my structure but the pi won't boot at all. Everytime I connect it with the power supply the green LED just blinks 2 times and thats it, constant red and no signal. I tested this with all cables besides the power supply disconnected and even switched the power supply several times. I really don't know what to do.

Is my pi broken?

  • 2 blinks is actually good; none would mean it can't read the card at all, and more than two would mean there's something wrong with firmware, etc. on the card. I have been confused this way before after thinking I fried it -- I presume you've tried this with a monitor plugged in? Is there no output at all? Make sure you have hdmi_force_hotplug=1 in config.txt. – goldilocks Dec 31 '14 at 14:29
  • No input at all, not even a LAN-cable nor HDMI nor VGA. I wrote a new downloaded Raspbian image to the file and even tried older versions that worked before with the same microSD type. I wish it would blink more, as those patterns are well documented but I cannot find any documentation for 2 blinks, so I don't know whats wrong. :( – NaCl Dec 31 '14 at 14:38
  • 2 blinks is what it does normally, and it will not blink at all if you remove the SD card. But I have not found documentation for exactly what it means either. Did you drop it? – goldilocks Dec 31 '14 at 14:47
  • No, there was no drop or anything like that. It was lying in a box for about 2 weeks working and then magically it stopped and here we are. – NaCl Dec 31 '14 at 14:49
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    What about the LAN lights? If those go up, it's established a low level ethernet connection, meaning the kernel is running (this does not mean it's actually connected to an IP network tho). – goldilocks Dec 31 '14 at 14:51

Just to put in answer form. Per official raspberry pi site, the dd command should be

 dd bs=4M if=2014-09-09-wheezy-raspbian.img of=/dev/mmcblk0

Edit: obviously changing image name to that of your image.

  • so bs=4M is needed... – NaCl Jan 1 '15 at 17:05
  • But you got it working though right? – geoffmcc Jan 1 '15 at 17:07
  • yes it works now. Adding bs=4M fixed it – NaCl Jan 1 '15 at 17:07
  • Okay cool. I read your comment wrong at first and thought you said bs=4 wasnt needed. Glad your up and running..... If you have a USB drive to spare, I would move file system to USB so it will perform better and not burn out your SD card. If interested check out raspberrypi.org/forums/viewtopic.php?f=29&t=44177 but powered drives work better than thumb drives. Plus you can over clock to turbo and not worry about slow SD read/write speeds giving you issues – geoffmcc Jan 1 '15 at 17:12

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