I have a rasp pi 3. I installed IOT, wrote an app and got it running just fine. It's been good for several weeks.
Yesterday, the pi wouldn't boot. Stuck on the Rainbow screen.
There was lightning in the night, so I thought maybe the flickering power supply might have caused this.
I reinstalled IOT, but got the same result.
I installed NOOBS on the SD card, and the pi booted up normally. I put IOT back on the card, and I'm stuck on the rainbow screen again.
So I guess both the pi and the SD card are OK. Something went wrong with IOT (an auto update perhaps?). I'm puzzled a new installation of IOT gets the same result. I used etcher to install IOT. Is there an image file of IOT I could just put onto the the card maybe?
I'd be grateful for any suggestions as to how to get this going again.