TV won’t pause. Can’t rewind, recordings fail.

A quick search reveals this to be a common problem with 360s.

Recordings are temperamental and very often corrupted (red exclamation mark symbol next to them).

Can't pause live tv - pressing play after pausing goes to current live pictures.

Have tried factory reset, keep recordings option - works for a while then reverts to unreliable recording and no pause.

Have tried the full factory reset (don't keep recordings).  No benefit over the keep recordings option and also means the rigmarole of having to logon to all my apps over again.

I use the ethernet socket, but plugged into a Netgear WiFi satellite.  All other WiFi devices work fine in the same room.

Asking for help here as my past experience with phoning 150 has been uniformly awful.  My understanding is that as this is usually due to a failing disk drive, only a new box can really fix this.