Troubleshooting
If things aren’t working the way you think they should, there area
few common mistakes and missed steps. Be sure to check all of the
following suggestions:
• Is the
correct type
of microSD card in the slot, and is it mak-
ing a good connection?
• Try copying the disk again with another card reader.
• Run a Secure Hash Algorithm (SHA) check sum utility on
the disk image and comparing the result to the 40-character
hash published on the download page.
• Is the Pi restarting or having intermittent problems? Check
your power supply; an underpowered board may seem to
work but act flaky.
• Do you get a kernel panic on startup? A kernel panic is the
equivalent of Windows’ Blue Screen of Death; it’s most often
caused by ...