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contact protrudes. You can fix this yourself but remember you can void your<br />
warranty. The contacts are delicate so be carefull. Insert a needle pin under the<br />
contact bulge and pull lightly up until the one end of the contact unclips. Clean the<br />
cavity where the contact unclipped from of any solder or other residue by blowing<br />
into the cavity. Clip the contact back into the cavity by lightly pushing it into the<br />
cavity. Do this for all the contacts. Look at these photos. Media:<strong>SD</strong>cardHolder.JPG,<br />
Media:UnclipContact.JPG, Media:UnclippedContact.JPG<br />
▪ If for whatever reason the main polyfuse F3 has been overheated previously it may<br />
happen that it hasn't completely recovered, in which case, if you turn the PI on, a<br />
considerable amount of energy from the power supply is lost in the fuse and doesn't<br />
reach the PI. Try if the polyfuse seems hot. For this problem too read<br />
#Troubleshooting_power_problems.<br />
Green LED blinks in a specific pattern<br />
With recent firmware, according to this forum post (http://www.raspberrypi.<strong>org</strong>/phpBB3/<br />
viewtopic.php?f=28&t=8725#p103338) the green light will blink in a specific pattern to<br />
indicate some types of errors:<br />
▪ 3 flashes: loader.bin not found<br />
▪ 4 flashes: loader.bin not launched<br />
▪ 5 flashes: start.elf not found<br />
▪ 6 flashes: start.elf not launched<br />
▪ 7 flashes: kernel.img not found<br />
Firmware since 20th October 2012 no longer requires loader.bin, and the flashes mean:<br />
▪ 3 flashes: start.elf not found<br />
▪ 4 flashes: start.elf not launched<br />
▪ 7 flashes: kernel.img not found<br />
If start.elf won't launch it may be corrupt.
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