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trouble with booting

droidus

I am not able to boot my Raspberry pi.  i am using a dvi to hdmi cable.  i have a dell monitor.  i have power to the board, and it is supplied by 1.2 a.  i got it to boot once, but it is not working again.  any thoughts or ideas?

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  • I suggest starting with the RasPi Troubleshooting Wiki.

     

    If you were able to boot once and now you can't, the usual suspects are:

     

    1.  Corrupted SD card from an unclean shutdown (always shut down using a GUI command or the GNU/Linux "shutdown" command).

     

    2.  Polyfuse F3 is misbehaving and has increased in resistance, which causes RasPi's 5V as measured between TP1 and TP2 to fall too low.  You do need a multimeter to diagnose these problems.

     

    3.  Iffy solder joint which has failed after power cycling.  This usually requires returning RasPi for an exchange.

     

    Many RasPi problems are power supply problems, such as an iffy polyfuse F3 or an iffy Micro USB cable.

  • in reply to johnbeetem

    don't quote me on the color.  not entirely sure if it's yellow.  could it be that other devices plugged into the same outlet strip taking more of the power, hence, it may not be getting the full 1a?

Reply Children
  • in reply to droidus

    when you say "Corrupted SD card from an unclean shutdown (always shut down using a GUI command or the GNU/Linux "shutdown" command).", does this mean even if the pi does not boot, to remove the power, then the sd card?  also, does it matter if you "safely eject" the sd card from the computer?  i thought it would only affect it if it was writing/using it (the sd).

  • in reply to droidus

    Hello Bobby,

     

    The pi works by using the graphics chip to bootstrap the OS, residing on the SD card. If the SD card has become corrupt, you will get a red light for a bit, but nothing will happen as the Pi won't boot. To use a Windows PC comparison, the Pi is using the SD card like a hard disk. If the PC hard drive became badly corrupted, all you would get is the BIOS, then nothing (or probably a few error messages). With the Pi, you get a flickering on the LED's then nothing as the boot process is transferred to the SD card, which is sitting there thinking it is a sheep or something.

     

    I'd re-image the SD card as a starting point and see if that allows your Pi to boot.

     

    Steve