Orange Pi Zero : "ERROR ### Please RESET the board"

Hello,

My Orange Pi Zero was working during a few days. However after a few days it stopped working. I tried to install a fresh armbian (and I also tried lot's of different distribution on several SD cards), and all of them are unable to boot. Today, I tried to plug an UART cable (USB <-> Serial) during boot in order to see what happened... And here is what I got :

U-Boot SPL 2016.09.01-armbian (Nov 14 2016 - 08:40:41)
DRAM: 0 MiB
### ERROR ### Please RESET the board ###

(The date of armbian of course depends on the version I'm running).

The RESET seems to refer to a power cycle reset (which I obviously do each time I try to restart), so I dont see what I can try to correct this problem.

The "DRAM: 0MiB" let me think that it has some troubles to recognize the RAM, but I'm not sure to understand it correctly. Do you confirm that ? Do you have any idea to solve my problem ?

Thank you,

tobiasBora