RNDU2000 Problem after factory reset

Hello everyone, 

A friend of me gave me its RNDU2000. 

I tried a factory reset. RAIDar find device at restart and gave me choices. I choose XRAID2. 

After several minutes (tests disks, intallatation...) device reboot and stuck with these LED configuration : Power On, act On, 1 On, 2 Blinking.

RAIDar can't find anymore and i got no access to admin frontview. 

I changed Hard Disks, make one more time a factory reset and I got same results...

Device answer to ping. 

Any idea ?