That seems to be the key - finding the settings in the first place!

Fortunately the guides I found did have where they were in the setup menu, but without that info I would never have found them.

As you say, it can really make a big difference to the picture.

Thank you for your reply captainkremmen.

I was just wondering if screen burn-in could result from having the same browser on the LCD computer screen regularly.

I bought my 42" Panasonic Viera hd ready tv in July 2005 and I've never experienced screen burn with it.

Geoff.

I wonder if it is possible for screen burn-in to occur on an LCD computer screen as a result of usage of the same browser regularly? Perhaps someone reading this knows the answer to this question and might be kind enough to reply here?

That's a good question. My dad has an external monitor he sometimes plugs into his laptop for spreadsheets and stuff and he uses it fairly often. There doesn't seem to be any screen burn so I'd say it's rare. All our computer suites at university also have LCD screens and I've never seen any burn in on those so I'd say it's unlikely.

No, you can't get screen burn on an LCD, they don't work that way.

What you CAN get occasionally is a faulty LCD panel, where it doesn't erase the previous information correctly - though this isn't limited to a permanent on-screen logo, but to any information displayed. It's pretty rare, I've changed perhaps two or three LCD panels for this type of fault, and scrapped four or five Plasma sets for it.

"Cause

Liquid crystals have a natural relaxed state. When a voltage is applied they rearrange themselves to block certain light waves. If left with the same voltage for an extended period of time (e.g. displaying a mouse cursor or the Microsoft Windows Taskbar in one place), the liquid crystals can develop a tendency to stay in one position. This ever so slight tendency to stay arranged in one position can throw the requested color off by a slight degree, which causes the image to look like the traditional "burn-in" on phosphor based displays. In fact, the root cause of LCD image persistence is the same as phosphor burn-in, namely, non-uniform usage of the display's pixels.

The cause of this tendency is unclear. It might be due to accumulation of ionic impurities inside the LCD,[1] electric charge building up near the electrodes,[2][3] parasitic capacitance,[4] or "a DC voltage component that occurs unavoidably in some display pixels owing to anisotropy in the dielectric constant of the liquid crystal".[5]

Usually the image persistence is temporary, but can become permanent. As a result, all major LCD display manufacturers exclude image persistence from their warranties."
http://en.wikipedia.org/wiki/Image_persistence

Shows how bad Wikipedia is

I've never seen any LCD TV warranty that excludes (or even mentions) image persistence - nor ever seen any hint of it, apart from obviously faulty panels.

I've seen it on a monitor at work - the task bar was clearly visible with the screen on before the pc had booted up. I can't remember the make but it was a small grotty cheap old lcd monitor. Now in the bin.

So it seems to happen! Maybe it depends on the monitor, the more expensive ones mightn't be as susceptible to it as the cheaper ones. Just my 2 cents.

Depends what you mean by 'happens', it had a faulty LCD panel in it - not screen burn - as I've already explained.

It's not because it's been used continually on the same picture, it's because it's faulty.

There must be alot of faulty panels out there then because i have seen screen burn on many LCD displays especially PC monitors. The Dell computer i am using at the moment as the itunes outline burnt on the screen. CRT's on the other hand i have never seen screen burn on. The nearest i have to screen burn on a CRT is seeing an image still being slightly displayed seconds after it should have dissapeared.

I meant that the screen burn might have been obvious after a certain amount of time. Did the monitor have the screen burn from day one or after a really short period of time (eg a week of regular use)?

I can confirm this is still an issue with certain models, it has happened on my Panasonic TX-P42XT50B. A few days of Test cricket last summer and the Sky Sports logo was slightly burned into the screen. It had had about a month's very responsible use avoiding logos, using screen wipe etc. It shows up on blue backgrounds. It's not a major detriment to viewing but it is slightly disappointing when you are led to believe this isn't an issue at all anymore. If buying a plasma I would recommend using all the techniques to break the screen in available on YT etc. Your friends and family may laugh but it's worth it to preserve the screen when you could be using it 5-10 years.

What's it called on a LCD screen? If it's not called image retention / screen burn?

It's not called anything, because it doesn't happen - LCD doesn't work in that way. You can get a faulty panel sometimes, where it doesn't erase the previous image correctly, but that's an actual fault, and not caused by continuously displaying the same image.

LCD screens do suffer from screen burn.

Of course it's not the same phosphor burn that plasmas suffer from, not least because LCDs don't have any phosphor. And LCDs are much more difficult to damage. But the LCD crystals will gradually lose their ability to fully switch if you leave a static image on there long enough, and that means burnt images on screen.

Sorry, but I've never seen, or heard of, any such occurrence - and see no reason to believe it's even possible?. My computer monitor has been displaying the same Windows taskbar for more than 10,000 hours - not the slightest sign of any such effect, and likewise for all others I've seen, and the LCD monitors that run permanently on static images.

As I have mentioned previously, you CAN occasionally get a fault on an LCD panel where the erase cycle doesn't work properly, so you see the previous image (or part of) as well as the current one.

Perhaps Foxconn LCD TVs don't suffer screen burn

So thats what us common folks would call image retention or screen burn

OK you say technicaly its not, but us common folk would just see it as a image that shouldnt be there

On the LCD screen of the till at work' you can always see the "enter cashier number" box, faintly in the background

On our old CRT tills, it had burned into it well badly

It's a faulty panel, no kind of 'burn' or 'retention', and the image doesn't stay there - while it's not erased, it is gradually 'overwritten' by subsequent images.

A good example is bringing the menu up, then cancelling it - and seeing how long until the menu 'disappears'.

I'm presuming that whatever caused such faults in the past has been 'cured', perhaps by later panel design?, as I've not seen any such faulty panels for a good few years now.

Just because you don't see it doesn't mean image retention can't happen (though it can usually be cured after a while, if it does happen) . iiyama LCD monitors including their latest 2560 x 1440 IPS monitor come complete with a health warning in the manual, that an afterimage of the previous screen image may remain after switching the image, when the same image has been displayed for hours. It goes on to tell you how to recover from the 'screen burn', which can take some hours. So yes it can and does happen but it isn't permanent, according to iiyama.

If you sell iiyama monitors, you can see for yourself or just google a manual. Or you could argue that because it isn't permanent, it doesn't exist.

So there's a design flaw on iiyama monitors, what has that got to do with TV's? - there's no such problems with LCD TV's.

Ooh clever, you nearly got me there for a moment!

However, the point is that LCD technology is subject to image retention issues, which if they occur (through misuse or forgetfulness for example) would need to be cleared, taking several hours in some cases. Are you suggesting that LCD TVs don't use LCD display technology? Or that cheapo LCD TVs somehow use a marvellous technology that expensive LCD monitors haven't yet got round to? Or that IPS monitors released in 2013 are the problem? Or... what?

Unless you clarify, I'm not going hunting for yet more manuals, I know what I'd find in them anyway and so, I suspect, do you.