TV Power Button - RFEDA Forum

Hi GuysMight be a tad off tangient, but hopefully someone might be enable to answer the question.I have been having a debate lately with one of my roommates who ademently believes that by turning off the power button on a TV it damages it. Correct me if I'm wrong but I cannot see how a manafacturer would place a power button on a television if they believed that it in fact damaged their electronic device.Anyways hopefully this wasnt too way off the beaten track but this is doing my head in.......So is it a myth or is it the truth ? Thanks in advance guys, your replies will help me sleep better at night kcfjscn
kcfjscn

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1	chdd	I can see where its come from, computers you shouldn't switch off without the proper procudure (thats not to say you can't switch them off though....) very old very large scale valve computers etc. were always kept running as switching them off/on would make valves start failing.In a TV set, the thing will wear far faster being left on than switched off, besides, its not really practical to leave it on!If you are talking about the main power (as opposed to standby), makes no difference, there is no reason to switch it off, but its not going to hurt it in any way if you do.	2008/9/3 20:55

2	nnxd	it would probably be bad if you turn it on and off repetadly, like a computer.When you turn it on, the power supply gets hit with high voltages fast, and high current draw (as the filament is low) or something like that. At least thats what happens to a computer.	2008/9/3 20:55

3	fujun2013	also keep in mind that components heat up and expand when turned on, and shrink when they cool. it's not by much but still does put just a little bit of strain on the component, but only if your really anal. kinda think of it like starting your car and turning it off. is it going to damage it? probably not, thats what it's made to do. is it good for it? probably not. should that stop you?personally, i wouldn't sweat it.	2008/9/3 20:55

4	chdd	Hard to say because it'd be very hard to prove in a controlled environment. I'll betcha for the most part it'd be brand/model specific as perhaps certain weaknesses in design or component lots get exploited. Thermal cycling and shock (as components, solder joints, and even the wire leads inside IC's expand and contract) is certainly a known failure mode. I'd think a larger one than component "wear" assuming the component was a quality part operating within it's design parameters. (not always the case) But how far do we take this? Certain IC's about 15 years ago WERE known to fail after prolonged use - something about impurities migrating? Dunno specifics. Betcha in my house 'puter supplies die faster left running due to the fans ingesting ciggy smoke and coating the PSU board in a nice insulating layer of crap (said as my puter fan howls away in distress ), so environment has to be taken into account. So does the duty cycle of on/off times.I have to wonder if your TV specific anecdote is related to early "instant on" tube sets where a (was it reduced?) filament voltage was present with the main power switch (marked "vacation" on some sets) on? Anybody?But yeah, as already said - in the real world I doubt it makes any noticable difference at all.	2008/9/3 20:55

5	398338	Hi,just to throw in my 2 cents....I actually own a set that breaks every 2 or 3 years if I use the standby too often.Appears to be a weak design round the standby power circuit as the STBY transformer burns after being in standby too long / often. So with this set I actually HAVE to use the on/off switch (haven't had to repair it again in 10 yrs).As mentioned before, it's hard to generalise, tough debate! Grts,K.	2008/9/3 20:55

6	pdang	Thanks for the replies guys.What I meant by powering off using the power button was using the remote to place it in standby. He believes that by leaving the television in standby mode it will prolong the life of it.	2008/9/3 20:55

7	hgping	Hi,QUOTE (skipee)What I meant by powering off using the power button was using the remote to place it in standby.If it's turned completely off and if/when the electrolytic capacitors in the power supply are dried out, it can be hard starting it again, but usually some time on stand-by will help (as will a set of new caps of course).The greatest impact on electronics components in general IS on startup, as the cold components result in a high inrush current stressing the components. In many devices, heat is a problem as well, a great killer of electrolytics caps.Modern days consumer equipment is designed to live a certain period when used the average amount expected. Use it much more and it will die sooner (and when it comes to electrolytic caps, they don't like NOT being used for extended periods as well).As usual, if you buy the cheapest stuff, it will (on average) die sooner than that being twice as expensive.	2008/9/3 20:55

8	addxjyx	Good luck!	2010/4/20 17:23
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