[Update: I wrote a post on how to fix the same issue on the Raspberry Pi 2.]
After opening the packaging on my brand new Raspberry Pi B+ and checking out the updated component layout, I was obviously pumped to boot it up! I quickly grabbed a 700 milli-amp power supply, wrote a copy of Raspbian from 01-07-14 to a microSD card, plugged the Pi into my LAN, connected power, and thought I was good to go.
My Pi wasn’t taking a DHCP lease from the router like it should, so I assumed it wasn’t booting. This time, I was right. The green and red lights would illuminate, but the green light would quickly fade. Only a solid red light remained lit. Also, the two lights around the LAN connection were both off.
My first three assumptions were:
- The Pi needed more power. A 5V/ 2Amp power supply is recommended, and the one I first tried to use was only 700 milli-amps.
- The disk image was too old for the B+. I had a copy of the 01-07-14 Raspbian image on my computer, and didn’t feel like downloading a new version.
- The Pi is…..broken?
First, I connected a higher amperage power supply to the Pi. Same problem.
Secondly, I updated the disk image to a newer version of Raspbian. I had my model B kicking around, so I booted it from the 01-07-14 version and ran three commands:
sudo apt-get update
sudo apt-get upgrade
Once the boot disk was fully updated, I transferred it back to the Model B+. The Pi immediately booted and took a DHCP lease from the router.