Volumio keeps going off line

Hi. I got a Pi for Christmas and now have it inside an old PVR case along with an IQaudio DAC plus, a hard drive and a wireless aerial. Actually be aerial is outside the case attached to a powered hub.

I have noticed that volumio looses he network overnight so last night I put a network cable on to replace the wireless and it still went offline. The router doesn’t show it as connected and I can’t connect via ssh either not surprisingly.

And tips on how to diagnose this much appreciated.