Hik-Connect Intermittent recording affecting one camera

[HIKI]

I've been having a problem with partial recording on one camera. An electrician said one of the wires had been pulled and fixed the issue by reconnecting the wires but its not recording for a few hours sometimes and sometimes there are many black lines over a period of a couple of hours

 

[Phil]

Can you please tell us a bit more about the make and model numbers of your cameras?
And your recorder?