I have a 512MB Model B (2012 edition I believe, possibly 2011...china made) and recently my power cord was partitally chewed through. Obviously, the Pi wouldn't boot up, as I noticed when I tried to SSH in.
So, I swapped out the power cord, but nothing happened. I watched the Pi as I plugged in the power cord and the red PWR LED simply slowly died, and nothing would come up on the screen. So, I thought, I'll just give it a rest for a day, seeing as it was up as a Spigot MC server 24/7 for quite some time. I let it sit for a day, and then booted it up again. This time, the PWR LED stayed on and the green ACT LED flickered, showing activity, but when I tried to SSH in, I got
ssh: connect to host 192.168.0.104 port 22: No route to host. I plugged in a screen via HDMI and I get the boot, but it seems different. Other than that the rainbow splash doesn't show up at all, I'm not sure what is different, but it is most definitely different.
Must be the router not recognizing the Pi, not sure why, but whatever. I swapped out the ethernet cable, but still nothing. I watched the Pi during a reboot and the Ethernet LEDs didn't come on and the Pi's static IP (which I know works, it worked for quite a while) wasn't displayed.
So, I was going to get some data from the Pi (eg. see if I could ping the router check if my static IP setup was still in place, etc.).
However, neither my Bluetooth keyboard (which does work with the Pi, have used it before) nor my Mechanical keyboard connected through a powered hub (also works, hub is confirmed to work and I have used it successfully before) were recognized.
So, I went a hunting and on the R-Pi Troubleshooting e-linux page, I found this:
No USB device works, with known good PS, SD card, KB
There has been more than one report of a R-Pi booting but not getting USB input, using a known-good power supply, SD card, and keyboard. The more common cause for no USB devices working is low power supply voltage from bad PSU, cable, or USB hub, but in this case the problem was no clock signal present at the LAN9512 USB/Ethernet chip "IC3", and the solution was to reflow the solder on the 25 MHz crystal "X1" on the bottom side of the board. Or return the board for a replacement, but before making this conclusion, confirm known good peripherals. A significant number of USB keyboards are not compatible with R-Pi. As of June 1 2012, Eben reported that only about 1 in 1000 shipped R-Pi boards have been found to have a hardware fault of any kind.
which perfectly describes my issue, but I have no clue why this hasn't popped up before!
I am going to re-image another SD card and see if that works, but I really hope that this hasn't fried my Pi's ethernet and USB ports!
Basically, my questions are,
- Does anyone know why the ports might not be being recognized
- Does anyone know of a way to fix it.