Proving power circuit is fine?

[tony9i9i9i]

I have a customer saying her TV keeps going off, I've been to visit 3 times, and the circuit has tested fine, with good continuity on the ring, and the voltage is bang on. I removed and few covers and all looked fine, the terminals were correctly tightened.
Not complaining about anything else on the circuit, or other circuits, I think it's the TV but want to prove it.
Is there anything that's not too expensive, that you can plug in to monitor supply presence and voltage over time? Anything similar to monitor the supply to the property. I'm guessing if there is and I had them, I could make use of them.

 

[littlespark]

Has the tv got an energy saving setting? Maybe it’s turning itself off after so many hours?

It could also be a circuit board inside the tv shutting down through to overheating. (Power board?)

A loose connection in the socket, or the plug of the tv?
It might just shut off if there’s a momentary cut in power.

Likely one of the first two if it’s happening around the same time after the tv has been turned on.

 

[mainline]

I have a customer saying her TV keeps going off, I've been to visit 3 times, and the circuit has tested fine, with good continuity on the ring, and the voltage is bang on. I removed and few covers and all looked fine, the terminals were correctly tightened.
Not complaining about anything else on the circuit, or other circuits, I think it's the TV but want to prove it.
Is there anything that's not too expensive, that you can plug in to monitor supply presence and voltage over time? Anything similar to monitor the supply to the property. I'm guessing if there is and I had them, I could make use of them.

You could use a relay that's latched so if the power dropped out, it would stay off.

You could plug the TV into another outlet that's not on that circuit.

 

[Bob Geldoff1234]

I have a customer saying her TV keeps going off, I've been to visit 3 times, and the circuit has tested fine, with good continuity on the ring, and the voltage is bang on. I removed and few covers and all looked fine, the terminals were correctly tightened.
Not complaining about anything else on the circuit, or other circuits, I think it's the TV but want to prove it.
Is there anything that's not too expensive, that you can plug in to monitor supply presence and voltage over time? Anything similar to monitor the supply to the property. I'm guessing if there is and I had them, I could make use of them.

If it only the tv that goes off and nothing else then it's the tv thats faulty.The easiest way is to run an extension lead from another socket.If the tv still goes off then it's the tv.If it stays on then its the original socket behind the tv that needs investigating.

 

[wrpizza]

A few months ago, the same happened at one of our jobs. The TV switched off, but the lights also flickered. Anyway, the TV is more noticeable.
We tightened everything at the intake and CCU. Turned out to be an issue in the mains and next day the pavement was dug out as the property lost power by 8pm previous evening.
Hopefully it's just the TV. As others said, plug it in somewhere else for 2 weeks, then back to the original socket. Probably your best bet.

 

[tony9i9i9i]

Thanks guys some good suggestions, I've already checked connections/socket etc, but didn't think to check the TV plug.
It's one of those when everything is fine when I'm there, I've had the megger plugged in with steady 240.
@mailine, I'd like to try that relay thing, don't suppose you could share some info on what I'd need and how to set it up?
Ideally, there would be something you could plug in that connects to the wifi, that sends data to an app, that could distinguish between a loss of communications and an actual loss of power.

 

[westward10]

I looked at something a couple of years ago when a couple claimed the TV went off when they switched on the flourescent in the kitchen. Sure enough the Sky box went off every time they turned on the light and no idea why, put an LED up problem solved so is it the TV or the signal?

 

[mainline]

Thanks guys some good suggestions, I've already checked connections/socket etc, but didn't think to check the TV plug.
It's one of those when everything is fine when I'm there, I've had the megger plugged in with steady 240.
@mailine, I'd like to try that relay thing, don't suppose you could share some info on what I'd need and how to set it up?

There are dedicated power monitors/alarms , but the cheapest way to know if there has been a momentary loss of power is to use a 230v coil relay, enclosure, neon, and a push to make switch.

RS PRO Plug In Power Relay, 240V ac Coil, 5A Switching Current, 4PDT | RS

uk.rs-online.com

You would wire it so that when the push to make switch is pressed the relay is energised and the contact closes, that contact is used to keep the relay energised.

The neon is wired so that when the relay is energised, it's on.

If the mains drops out, the neon goes off and stays off until the switch is pressed to latch the relay back on.


To be honest, it's unlikely to be momentary mains loss and could be either a faulty power supply or as said interference.

What's the model of the TV.

 

[Sapper]

Could be an intermittent contact so it may be worth just changing the plug and socket.

 

[tony9i9i9i]

There are dedicated power monitors/alarms , but the cheapest way to know if there has been a momentary loss of power is to use a 230v coil relay, enclosure, neon, and a push to make switch.

RS PRO Plug In Power Relay, 240V ac Coil, 5A Switching Current, 4PDT | RS

uk.rs-online.com

You would wire it so that when the push to make switch is pressed the relay is energised and the contact closes, that contact is used to keep the relay energised.

The neon is wired so that when the relay is energised, it's on.

If the mains drops out, the neon goes off and stays off until the switch is pressed to latch the relay back on.


To be honest, it's unlikely to be momentary mains loss and could be either a faulty power supply or as said interference.

What's the model of the TV.

Not sure of the TV make/model; I can check when I go back.
Do you have any tips for testing for interference?

 

[mainline]

Not sure of the TV make/model; I can check when I go back.
Do you have any tips for testing for interference?

There are various power analysers, spectrum analysers etc but none are cheap and even then there is no guarantee in a definitive answer.

How often does this happen ?
Does it seem to occur at a particular time ?

Does the TV shut down and goto standby immediately, or does it lose picture first ?

Does it do it while they are watching it, and they can immediately turn it back on ?



If it was me, I would take their TV for a few days and leave it on a soak test.