Computer Monitor Life Expectancy!

[Pádraig Ó Dubhaigh]

Does anyone know what kind of lifespan could be expected from an LCD screen in a typical school setting (8hrs/day, ~170days/year)?  4 years? More?

Also, does leaving a monitor on standby when PC is off affect lifespan? 

Thanks!

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Le meas,

Pádraig Ó Dubhaigh

WWW: www.pdu.ie

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[Greg Ashe]

At least 4 years. I would have a number that are on at least 14 hours every day during term time (approx 220 days) as we are a 7 day boarding school and computer room is open access 

gpa

Only print this if you have to

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[David Dalton]

All monitors are not created equal and the life expectancy of a monitor can vary enormously. Environmental factors, particularly the temperature have a huge influence .  I have seen low end non branded monitors fail after a little more than a year. Some of the original flat panel monitors we sold from HP are still in use over 8 years. Best practice ? Physically power off the monitors after use, clean the dust grills at the rear of the units and most importantly ensure the temperature of the room is not too high (computer rooms often suffer from very high temperatures due to the computers, monitors and students.  Eg. 30 computers @ 250W each + 30 Monitors @ 120W each + 30 students approx 100W each gives over 17Kw. Of heat in a computer room while it is in use.)

 

 

 

 

David Dalton

Managing Director,

ü        www.itsystems.ie

[Laurence Cuffe]

On May 05, 2011, at 08:33 AM, David Dalton <david....@itsystems.ie> wrote:

All monitors are not created equal and the life expectancy of a monitor can vary enormously. Environmental factors, particularly the temperature have a huge influence .  I have seen low end non branded monitors fail after a little more than a year. Some of the original flat panel monitors we sold from HP are still in use over 8 years. Best practice ? Physically power off the monitors after use, clean the dust grills at the rear of the units and most importantly ensure the temperature of the room is not too high (computer rooms often suffer from very high temperatures due to the computers, monitors and students.  Eg. 30 computers @ 250W each + 30 Monitors @ 120W each + 30 students approx 100W each gives over 17Kw. Of heat in a computer room while it is in use)

 

 

Much as I apreciate the call to quality in this reply, I would note that my HP2159V 21 inch LCD monitor is showing signs of age after a little over a year. This is most apparent when it is displaying a black screensaver, in this case there is a series of slightly paler vertical bands across the screen, together with some paler edges at the screen border.

If I wish to turn it off at nignt, it displays an annoying "power button lockout" feature, and only switches off after you have held the power button down for about twenty seconds.  Being in a mathematical frame of mind, I'm not sure that I want to spend an hour a year turning off my monitor, or if I had these in a classroom that I'd like to spend five minutes just trying to get all the monitors off each day.

For the record my second hand dell s900 CRT monitor lasted for nine years after I bought from someone in buy and sell.

In pricinciple the failure mode should be weakening of the backlight, and these are specified as 60,000 hours to half brightness. In practice you mileage may vary. Other factors which can affect them are heat which can affect the light polarizors in the display system, mousture, and exposure to UV light, which can degrade the organic compounds in the liquid crystal. Each of these insults can be controlled by aditional steps in the manufacturing process, so David is correct in saying that with LCD displays you roughly get what you pay for. My HP monitor is, I think, from their budget line, and I would suspect that some cost cutting was involved.

All the best

LAurence Cuffe

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