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I'll start by saying that I probably shorted something to cause this.

I noticed this behavior the next morning after spilling some water next to it. I didn't think any got on it through the holes in its case, but I'm thinking I may be wrong about that.

Now the green ACT light blinks 4 times in sequence when plugged in.

Raspberry Pi model B 512mb running headless piCore player

I have:

  1. Removed the SD card that was in it and successfully booted another Pi up with that card.
  2. Re-imaged another (previously tested) SD card with Win32diskimager with a fresh copy of a previously tested Raspbian image.
  3. Placed the Pi on 3 other power supplies. All previously tested to work on this and other Pi's.
  4. Verified that the voltage between TP1 and TP2 is approximately 4.93vdc.
  5. Tried it with nothing plugged in besides SD card and power.
  6. Tried the card with Raspbian on it hooked up to HDMI - no signal getting to the display.
  7. Left it on and blinking for an hour - normal temperature when I checked it.

I don't see any visually obvious discolorations or other failures.

Is there anything else I can check or do with it before tossing it?

Jacobm001
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Praxis
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1 Answers1

3

This topic on RPi forum gives the following information about blinking ACT led:

  • 3 flashes: loader.bin not found
  • 4 flashes: loader.bin not launched
  • 5 flashes: start.elf not found
  • 6 flashes: start.elf not launched

"Not launched" usually means the file is corrupt. I'm not sure how loader.bin gets damaged considering you've done a reflash before testing. Make sure you're following whatever "Safe removal" procedure is offered by your OS, and run a filesystem check after flashing the image to be sure.

Dmitry Grigoryev
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