CM3 does not boot. ACT stays solid green

Question

I've got a CM3 module which is working perfectly, and I received my second CM3 last week and I've been trying to clone the first to the second with no luck.

I start with the first CM3 and ran:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get install rpi-update
sudo rpi-update

reboot

sudo apt-get update
sudo apt-get upgrade

after reboot. And the first one still works. Then I put the first one into my CMIO3 and make an image using

sudo ./rpiboot
sudo dd bs=4M if=/dev/sdb of=cm3.img

Wait a couple of minutes until the image creation finishes and switch the modules off, disconnect and connect the second CM3 module. Write the img to the second module

sudo ./rpiboot
sudo dd bs=4M if=cm3.img of=/dev/sdb

After dd finishes I disconnect the USB slave cable, disconnect and reconnect power cable and both POWER and ACTION LEDs stay solid red and green respectively.

Using Raspbian Jessie. Kernel 4.9.33-v7+

Answer 1

Instead of cloning the image, try imaging the CM3 module with the fast, painless method I documented at following link:

How do I Flash (install) Raspbian on Raspberry Pi Compute Module 3 / 3+?

Since this method is proven to image a CM3/3+ correctly, your CM3 should boot. If it doesn't, then the shape of the problem is something other than how it was imaged. HTH-