Yes after few seconds there is beep and red light. And I have to setup again IP and all the settings. In first place in my opinion, there wasn't problem in fan. Beacuse I recall, before changinfg fan it was same situation, like now. No hash. S5 was running for 6 months.

I can try with firmware upgrade again.

What's the number in LOCALWORK it's increasing, but no hash.

What the black button inside S5, near the fan connection ?