Thought it has to be enabled ?
While your stuck get a resistor and put it across 1k and it should stop it from throwing the error until you work something out
Not really
Common for fan to make the noise
If hard disk doesnt spin up common for hd failure rather than PSU
All vague unless you test it all of course , you don't need logs and menus to test that stuff
But we already told you where to start?
Are you basically saying you don't have a clue how to find the manual to atleast wire the keypad to the control panel
If you can't get that bit done , I would forget Bout this .....
Leave coms til last , mount your panel and keypad , c078 , and the coms boards should already be mounted hopefully
Switch on and see what faults you get, work through one by one
This is the second bell? Or all wired up inside the control panel with both cables
I never had an issue the plastics on the Delta bell , unless that backplate tamper screw has snapped the tab maybe possible
Or as said Bel is faulty but then I would swap the modules round if easy for you , that way you will know it's not the bell module as fault should follow
Leaves you with plastics and cabling issue
Only way is to try it
https://www.virginmedia.com/help/how-to-use-websafe
Also possible you could change the DNS setting on the smart com if it let's you to 8.8.8.8 the usual lol and see if that helps , I didn't know your panel well so not sure what settings are available