Help, i brick my DS-7108N-SN

[avoid]

I have 3pcs DS-7108n-sn /chinesse, all the same identical firmwares and etc./ The two from then i I successfully updated through TFTP with 3.0.18 version, without problems, but ultimate from then i bricked.
No detect NVR in SADP and nothing, restarting and nothing.
When connecting through the monitor, the initial logo comes out and restarts.
How can I restore it?

 

[alessadnro]

hello, I too have the same problem with the model DS-7108N-SN / P after updating it with the firmware 3.0.18 through the USB port to charge the logo and restart it continuously. can you help me to recover the NVR?