Fortigate 60c died immediately after an update

salve a tutti subito dopo un aggiornamento del mio FortiGate non riesco piu ad accedere al mio dispositivo le uniche spie accese sono la power e sdhc come posso fare questo è quello che è emerso collegando un cavo rj45-usb dal console al usb del mio pc e avviando advance serial monitor come posso fare?

Google Translation: Fortigate 60c died immediately after an update

hi to all immediately after an update of my FortiGate I can no longer access my device the only lights on are the power and sdhc how can I do this is what emerged by connecting a rj45-usb cable from the console to my PC and USB starting advance serial monitor how can I do?

<LF>============== Fortinet Hardware Quick Inspection Report ================== [len=76]
<20190619094434.795 RX>
<LF> [len=1]
<20190619094434.810 RX>
<LF> [len=1]
<20190619094434.810 RX>
<LF> BIOS Integrity Check: PASS [len=52]
<20190619094434.863 RX>
<LF> System Configuration Verification: PASS [len=52]
<20190619094434.923 RX>
<LF> Memory Test: PASS [len=52]
<20190619094434.970 RX>
<LF> CPU Test: PASS [len=52]
<20190619094435.018 RX>
<LF> USB Test: PASS ( 0 USB Device) [len=68]
<20190619094435.100 RX>
<LF> HD/FLASH Test: PASS ( 1 SDHC Disk) [len=67]
<20190619094435.162 RX>
<LF> Network Controller Test: fail X [len=57]
<20190619094435.229 RX>
<LF> SDHC LED Test: PASS [len=52]
<20190619094435.291 RX>
<LF> NIC LED Test: fail X [len=57]
<20190619094435.338 RX>
<LF> HA/ALARM LED Test: PASS [len=52]
<20190619094435.402 RX>
<LF> [len=1]
<20190619094435.402 RX>
<LF> [len=1]
<20190619094435.403 RX>
<LF>============== Fortinet Hardware Quick Inspection <xxx FAILED xxx> ================== [len=86]
<20190619094435.500 RX>
<LF> [len=1]
<20190619094435.500 RX>
<LF>Network Controller Test requires loopback cables. [len=50]
<20190619094435.552 RX>
<LF>Failure on this test may be caused by bad cable or poor connection. [len=68]
<20190619094435.626 RX>
<LF>Check wirings before taking further actions. [len=45]
<20190619094435.677 RX>
<LF>