My Raspberry Pi is a version 2 Model B. For my company, we always use this model with the same SD card images for years now. Recently we bought new Pis from a different company, the same model. We've tried two Pis with two different SDs that work in Pis from other companies.
The Linux flavour is Raspbian and the kernel version is 3.18.11-v7+.
When the Pi boots the red light comes on and stays solid. But the green light links blinks 4 times long and 4 times short. Is that supposed to be a total of 8 blinks or two variations of 4 blinks?