HP pavilion model 15-n032sa
SMART Hard Disk Error shows up when started followed by list of options
Hard Disk 1 
I'll try that now, I'll just go out to the shed for a hammer!
no improvement following suggested action
yes no change
thanks for your help. I got the impression this was probably terminal. An ooccasional vacuuming and decent anti virus generaly keeps problems at bay. Despite an error/fault code I did not have false expectations that you could fix all. This mainstream kit is not made to last forever.