I recently bought a Pi3 Model B+ from core electronics and received it from Australian POST.
The board unfortunately does not light up (which I’ve tested on my Pi 2 with the same SD card with fresh Raspbian). The red light keeps red and not blinking. The power supply is of good quality (5v 2amp Apple ipad changer). It seemed that this board is faulty.
Should try Raspbian Stretch at first place! Just baked a new Stretch on a fresh SD card, which booted successfully on Pi 2, but still no luck with the Pi 3 B+. The green light next to the red never flashed while connected to power…
Thanks for that info! You’ve done what you can to figure this out on your side. I’ve sent you instructions to return the RPi to us, so we can test it using official hardware and replace it if need be.