Re: [Dorset] OT: Lifetime of TV screens
Hi Graeme On 06/12/2019 16:18, Graeme wrote: On 06/12/2019 12:00, dorset-requ...@mailman.lug.org.uk wrote: Re: OT: Lifetime of TV screens I have two extension boards: one powers devices that have to be on 24/7 such as aerial amplifier, HDD recorder. The other powers the TV, DVD player, fresat tuner. The latter remains on from first switch-on (wife watching one-* disaster films while ironing!!) to when I retire. I've long recognised what Terry says about leaving electronic devices on because switching off/on can stress them - I have all my computers on 24/7, and 4 of them are running Boinc. The situation is a bit different when power cycling into standby as the power consumption is very low, so thermal cycling effects are typically orders of magnitude less than in going from standby to fully on. Cheers Tim -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] OT: Lifetime of TV screens
On 06/12/2019 12:00, dorset-requ...@mailman.lug.org.uk wrote: Re: OT: Lifetime of TV screens I have two extension boards: one powers devices that have to be on 24/7 such as aerial amplifier, HDD recorder. The other powers the TV, DVD player, fresat tuner. The latter remains on from first switch-on (wife watching one-* disaster films while ironing!!) to when I retire. I've long recognised what Terry says about leaving electronic devices on because switching off/on can stress them - I have all my computers on 24/7, and 4 of them are running Boinc. Graeme -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] OT: Lifetime of TV screens
On 06/12/2019 14:31, Ralph Corderoy wrote: Hi, Terry wrote: The qualified answer is that there is no doubt that far from reducing the lifetime of components, leaving an electronic device turned on increases reliability. That's definitely true for some things. My main computer is an Acer Revo bought early 2011. Nine years is more that I expected to get out of it. I did have to replace the rusty hard drive at the first sign of trouble, but that was only sixteen months ago. For all but the first year or so of its life it's been running continuously. Even its small original fan is happy. I've found all electric kettles purchased in the last eight or so years fail, typically after just over a year, sometimes under. Doesn't matter if they're unbranded ones sold as a supermarket's own, or branded ones at three times the price. Which? magazine seem to have finally cottoned onto this problem after someone wrote in to complain their kettle reviews don't take longevity into account. The other common failure point I find on TV, monitors, and mobile phones, is the on/off switch. That small button you hold in. The TV one started to be erratic so now it's left ‘on’, switched to standby with the remote control, and powered off at the mains wall socket. The monitor's switch did the same so the monitor is left on all the time, relying on the PC to switch it to standby. The power switch goes wrong with mobiles so often that there's quite a few apps to repurpose another button, e.g. volume. As for putting the TV on standby. Here, it's typically only for a concentrated period of an evening so it's powered off all the other hours. I'd suggest, Peter, that whether to switch to standby depends on how long you think you'll be gone and the odds that it will be much longer. Well, The TV does not have an ON/Off switch, so unless I want to bend down to the power socket and unplug it (Leaving the PVR on) It lives in standby. Along the same line, the screens on my computers have one of these EON device controllers that switches them off when the main device (Computer) is switched off so they do get switched off and on (once a day). P. -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] OT: Lifetime of TV screens
On 06/12/2019 09:17, PeterMerchant via dorset wrote: The question that has been raised at home is whether it is better to turn off (Standby) the TV when you leave the room for a short period. The one opinion that I have found on the Internet is that leaving it on only costs an small amount of electricity. Happy with that. But is there a cost in terms of stressing the components and reducing the lifetime for modern TVs? We have a Samsung and a Toshiba LCD TV. And does any answer relate to computer screens? Cheers, Peter M Thanks all for your replies. Our Samsung TV has not been completely powered off since I unplugged it to add a surge protector a month or so ago. So it will not get the On/Off stresses. The other TV I had for awhile connected to a Smart plug and was therefore turned off completely when not in use. That was until I discovered that the TV consumed 45 ma in standby and the Smart Plug 80. P. -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] OT: Lifetime of TV screens
Hi, Terry wrote: > The qualified answer is that there is no doubt that far from reducing > the lifetime of components, leaving an electronic device turned on > increases reliability. That's definitely true for some things. My main computer is an Acer Revo bought early 2011. Nine years is more that I expected to get out of it. I did have to replace the rusty hard drive at the first sign of trouble, but that was only sixteen months ago. For all but the first year or so of its life it's been running continuously. Even its small original fan is happy. I've found all electric kettles purchased in the last eight or so years fail, typically after just over a year, sometimes under. Doesn't matter if they're unbranded ones sold as a supermarket's own, or branded ones at three times the price. Which? magazine seem to have finally cottoned onto this problem after someone wrote in to complain their kettle reviews don't take longevity into account. The other common failure point I find on TV, monitors, and mobile phones, is the on/off switch. That small button you hold in. The TV one started to be erratic so now it's left ‘on’, switched to standby with the remote control, and powered off at the mains wall socket. The monitor's switch did the same so the monitor is left on all the time, relying on the PC to switch it to standby. The power switch goes wrong with mobiles so often that there's quite a few apps to repurpose another button, e.g. volume. As for putting the TV on standby. Here, it's typically only for a concentrated period of an evening so it's powered off all the other hours. I'd suggest, Peter, that whether to switch to standby depends on how long you think you'll be gone and the odds that it will be much longer. -- Cheers, Ralph. -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] OT: Lifetime of TV screens
On Friday, 6 December 2019 09:17:04 GMT PeterMerchant via dorset wrote: > The question that has been raised at home is whether it is better to turn > off (Standby) the TV when you leave the room for a short period. The one > opinion that I have found on the Internet is that leaving it on only costs > an small amount of electricity. Happy with that. > > But is there a cost in terms of stressing the components and reducing the > lifetime for modern TVs? We have a Samsung and a Toshiba LCD TV. And does > any answer relate to computer screens? The qualified answer is that there is no doubt that far from reducing the lifetime of components, leaving an electronic device turned on increases reliability. Just try switching an old fashioned tungsten light bulb on and off rapidly and see what happens. I said that it was a qualified answer and I will try to explain: 1. Repeated on-off cycles stresses components. Back in the 1970s, we found that most military kit would fail fairly regularly. Out of a squadron of 12 aircraft an average of two would land with faults in the Avionics after each sortie. However, during exercises, when aircraft were not shut down between sorties, the failure rate was much lower. Having said that, modern electronics tends to be designed to provide a 'soft start'. One of the major problems was the inrush current that occurs when equipment is switched on; modern PSUs tend to increase the applied voltage relatively slowly, thus limiting the current until all the capacitors in the device are fully charged and any temperature sensitive devices are warmed up. 2. *Some* electronic devices will have lifetime hours. Most modern electronics have Mean Time Between Failures (MTBF) of many thousands of hours. The exception tends to be things that output something to the real world, such as a display screens, speakers (and to some extent the associated amplifiers). With LCD TVs, this can be seen most readily in older devices that exhibited strange whorls and distortions due to the heat of the backlight stressing the screen. Theoretically, faults in OLEDs are possible owing to pixels failing. However, the jury is out on this because OLED displays are still relatively new. Personally, I leave TVs etc on Standby most of the time (day and night), but with older sets that used a fluorescent tube as a backlight, I turn them off overnight because of the increased standby power consumption. -- Terry Coles -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
Re: [Dorset] OT: Lifetime of TV screens
Hi Peter On 06/12/2019 09:17, PeterMerchant via dorset wrote: The question that has been raised at home is whether it is better to turn off (Standby) the TV when you leave the room for a short period. The one opinion that I have found on the Internet is that leaving it on only costs an small amount of electricity. Happy with that. But is there a cost in terms of stressing the components and reducing the lifetime for modern TVs? We have a Samsung and a Toshiba LCD TV. And does any answer relate to computer screens? No, won't affect the lifetime of the TV either way, but will shorten the life of the switch on the mains socket, which has a finite number of cycles. Same with a computer screen - they're the same thing really bar the TV receiver. If you want to consider secondary factors: Leaving it on in the winter converts a tiny amount of electrical energy into a tiny amount of useful heat. In a damp room, better to leave it on. Cheers Tim -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
[Dorset] OT: Lifetime of TV screens
The question that has been raised at home is whether it is better to turn off (Standby) the TV when you leave the room for a short period. The one opinion that I have found on the Internet is that leaving it on only costs an small amount of electricity. Happy with that. But is there a cost in terms of stressing the components and reducing the lifetime for modern TVs? We have a Samsung and a Toshiba LCD TV. And does any answer relate to computer screens? Cheers, Peter M -- Next meeting: BEC, Bournemouth, Tuesday, 2020-01-07 20:00 Check to whom you are replying Meetings, mailing list, IRC, ... http://dorset.lug.org.uk/ New thread, don't hijack: mailto:dorset@mailman.lug.org.uk
