This is indeed strange.
Try booting with your SD-card and then delete all the contents from the sketch folder.
Then reboot and there should be no LED that is blinking
After that try uploading sketches again and see if it works.
Thanks for the reply but I think you misunderstood my problem.
The SD card is irrelevant - I can't upload anything even with the SD card removed.
Oh Yes. I misunderstood the question
Try updating the firmware again. It should replace SPI Linux and the firmware to a fresh install.
Hopefully the problem disappears.
Use the latest arduino IDE available from Intel.
That fixed it! Thanks so much for your help, I really appreciate it!
I still have no idea what caused this to happen, but now that it's working again I'll keep my eyes open for anything in any of my sketches that may replicate this issue.
Good I am glad that you figured it out!!
I may have spoke too soon .
For some reason it downgraded my firmware to 1.0.0 and now it's not letting me go back to 1.0.2 (it says 1.0.0 is the current version, only offers to reload it). Also, when I booted from the SD card it let me upload one sketch and then the problem came back. Going to reimage my SD card and see what happens then. Such a mysterious problem...
are you sure that you downloaded the latest IDE ? I am not aware that they changed this.
Yes, it seems that reformatting the SD-card looks like a possible solution.
This is weird.
You're right - I did accidently download the older IDE. I tried removing the IDE and using a fresh download before I did the firmware update, I must have downloaded it by accident.
Today is not my day .
No worries man.
I think you should be fine now.