RasPi not booting - Raspberry Pi Forums

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i have received new 512mb rev-b model , despite having prepared sd card multiple times using multiple different images, cannot pi boot. when powering board, red power light coming on. have tried altering config.txt file in order default hdmi output (i have hdmi connection on monitor), did not help. have tried removing config.txt altogether, suggested in 1 forum, did not work either. have tried using risc image, again no avail. using 2gb microsd sd adapter. had read type of problem can stem poor electrical connections between sd card , board, , have tried applying pressure holder whilst booting, made no difference. visually though, these solder connections seem okay - not want reflow them yet. 1 thing strange however, when writing image (using dd mac terminal) , process takes around 20min, , couple of youtube videos have watched, process seems take around 30s. there fault in way preparing card? here process:

* use diskutil erase sd card ms-dos format
* terminal: "df -h" find out name of disk (/dev/disk1s1 in case)
* terminal: "sudo diskutil unmount /dev/disk1s1"
* terminal: "sudo dd if=...path.to.filename.img of=/dev/disk1s1 bs=1m"
* wait ~20min
* done
* terminal: "sudo diskutil eject /dev/disk1s1"

have ideas on doing wrong? thanks.

have verified data isactualy on sd card?


raspberrypi



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