Re: Power Issue With TFT Monitors
- From: "Mike the Brewer" <mike-tech@xxxxxxxxxxxx>
- Date: Fri, 09 Nov 2007 21:30:01 GMT
"SpeedBird" <BrummieRob@xxxxxxxxxxxxxx> wrote in message
news:1194358696.783154.211250@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| On 6 Nov, 13:37, "Mortimer" <m...@xxxxxxxxxxx> wrote:
| > "SpeedBird" <Brummie...@xxxxxxxxxxxxxx> wrote in message
| >
| > news:1194355610.486989.222910@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| >
| >
| >
| > > Hi there,
| >
| > > I have a strange problem in my offices. We use a combination of TFT
| > > and CRT monitors with our PC's. Over the last few months the TFTs have
| > > started to die. They begin by flickering and eventually don't display
| > > a signal at all even though they have power and a signal (the power
| > > light remains illuminated). Sometimes they will display an image
| > > momentarily but flicker back off after a second or so. I have checked
| > > power management/energy saving features but they don't seem to be a
| > > factor.
| >
| > > The monitors are of varying ages, different brands and from different
| > > stores. Only TFT monitors are affected. I cannot find a common reason
| > > for them to fail. I'm due to do a PAT test later this month but I'm
| > > worried that this will kill the few remaining monitors.
| >
| > > Is this likely to be a problem with the mains electrical supply,
| > > interference or something else? We have two separate incoming mains
| > > supplies but monitors have died regardless of which supply the ring
| > > main was powered from.
| >
| > I wonder if it's the back-light that's failed. Strange that it should
fail
| > on more than one monitor over the space of just a few months - very
| > coincidental. Try shining a desk light obliquely on the monitor and see
if
| > you can see a faint image of what should be there - if so, the monitor
is
| > working in all respects other than not being able to shine a light
through
| > the display to produce the image.
| >
| > I don't know why backlights are so temperamental on LCD/TFT displays -
both
| > of my laptops have developed intermittent backlight problems - from
| > power-off, it takes a bit of wiggling of the lid to get the light to
come on
| > and stay on, but once it's on, the lid can be moved and there's no
problem.
|
| Bingo! I held a torch to the affected screens and could see the image
| so the problem is with the backlights. Time to invest in some surge-
| protected power strips (and replacement backlights).
Yes...and from what I have heard new backlights are bloody expesive
too........
( Can anyone enlighten me further ? )
|
.
- References:
- Power Issue With TFT Monitors
- From: SpeedBird
- Re: Power Issue With TFT Monitors
- From: Mortimer
- Re: Power Issue With TFT Monitors
- From: SpeedBird
- Power Issue With TFT Monitors
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