Raspberry Pi not booting up

Last week I had some time to get my Pi started again.

I plugged it in, but had forgotten to plug in the screen (it doesn't seem to autodetect the screen if I plug it in while it's on) so I unplugged it. (It booted fine, all the lights went on and I could ping it on the network).

I rebooted it with the screen plugged in but nothing happened. The PWR light goes on and the OK light has the small light on (as in very faint).

The closest I could come with google was this:

http://www.raspberrypi.org/phpBB3/viewtopic.php?t=14625&p=150859 said:

by chr157 » Thu Aug 16, 2012 1:54 pm
Yes, I can confirm that the hub is completely dead. I have tried it with another power supply, and connected to different machines (PC, Xbox 360).

To me it seems as if the hub dying might have caused a power issue on the Raspberry Pi. But certain things on the Pi make me reluctant to just throw it away.

(1) With no SD card, the red PWR light comes on and stays on, and the green OK light is illuminated, but only very faintly.

(2) With a brand new SD card with an OS written onto it the red PWR light stays on and the green OK light flashes once and goes out, as previously described.

(3) The voltage across TP1 and TP2 is around 4.75 V.

(4) The voltage across the small capacitor right next to the status LEDs changes over time. I forget the exact figures, but I think it was somewhere around 0.3 V average.

(5) The large Broadcomm chip and the smaller square chip both get warm over the course of a few minutes, as they did when the pi worked.

Click to expand...

I've tried both my cellphone charger (5V 700mA) which has worked perfectly with the Pi, and my Kindle cable, plugged into my computer, which has also worked fine with it.

Unlike #2, there's no flash that I see.

I will try re-flashing my card and check if that perhaps lets it boot.

Any help?

Edit:
http://www.raspberrypi.org/phpBB3//viewtopic.php?f=63&t=7801 seems to have the same problem as me. Got 26min left on the image download, so will flash it then.

Fixed, I think. Twas the SD card's contents that probably went corrupt.

Edit. And dead again.

I had similar using a Class4 card - never had a problem on my class 10 though. What card is it?

GreGorGy said:

I had similar using a Class4 card - never had a problem on my class 10 though. What card is it?

Click to expand...

It's a card I jacked from one of my SLR cameras. It's a class6 iirc. It worked fine in the 20 times I booted it, just suddenly the other day when ^^ happened.

Ok, happened again. Re-flashed the image, booted it, works. Next boot, broken.

I will try another SD card and if it's fine, will go buy a new one for it.

Interesting - I wonder if the back-writing to these slower cards causes issues later on. Or maybe the seating isn't as secure as it should be. Maybe I'll try a stress test on the C4 card. Which OS? Currently, C4 is Arch and C10 is Wheezy.