I have the Genstar HD Tuner and a Pi Model B. It has a 2A PSU and I’ve downloaded the latest Pi 1 ZIP (size suggests it’s the 3.1 build). I have used a Windows PC to format the 16 GB Sandisk 40MB/s SD Card (and tried with 16GB Verbatim too) using SDFormatter 4 (with the Format Size Adjustment ON) and have copied the latest unzipped ZIP contents onto the root of the card however I only get the rainbow boot up screen. I have tried one of these cards with a standard NOOBS build and it worked fine.
I do not have a wireless dongle to hand currently so the setup was a Cat5e cable to my switch and onto my router (which worked fine for the NOOBS build). I have a USB keyboard and HDMI too. I have tried with and without the HD tuner connected but it makes no difference. The Pi starts up and I see the small green LED light up with the red LED. This lasts about 2 seconds and the green goes out leaving just the red LED. I have tried leaving the unit for some time to see if it is caught in a long loop but no further progress. I note that the Ethernet port on the switch is not indicating any active connection either. My LAN (and DHCP) is on 192.168.2.x subnet.
Any thoughts welcome as I’m not sure I’ve got any other diagnostic opportunities open to me?