TFT LCD - a step backward ?

I used to fix 3-4 dead LCD backlights a week. It's fiddly, but not all that difficult.

Oh yes you can fix them. Find a replacement backlight. Taking apart the screen is a bit tricky (Ok sometimes a lot tricky), but it can be done.

some repairer you are, can't fix a simple backlight.

Well it's not as if anyone gets the CRT monitors repaired anymore anyway, everything is so cheap and disposable and I suspect it will continue that way unless disposal costs rise significantly. Also many of the most common faults with TFT monitors can be repaired, I usually see dead power supplies or bad backlight inverters or tubes.

Yep. All of which are cheap & easy to swap out. (Except for the tubes, which require a fairly delicate touch.)

|>In the past, when the big-fat monitors were still been used, if |>there's any problem with them, I can open them up and find and fix the |>problem. |>

|>Nowadays, where the TFT LCD bunch is taking over, when a monitor fail, |>it just dies. Can't be repaired, nada, zilch. |>

|>To me, the TFT LCD represents a step backwards. I have on my hand 5 |>TFT LCD monitors that lie belly up, and I just can't fix them ! All of |>them have the same problem - the back-lighting fails, but since |>everything is compressed into a compact module, there's no way to fix |>it ! |>

|>Darn ! !

Unless they are like the 1989++ Sharp Plasma Screens, that were all glued to hell, just popping out the "seems" would give you a good picture of the situation..brownouts...cold solder/etc.... most are very *Tweaky*

After all the research, You only learn from your hands on experiments.....

I've replaced ccfls in a laptop display so I imagine it would be much easier on a desktop display.

You must not be trying very hard. What would be interesting is to see if there is some way to refit it with LEDs for illumination. Not on a "good" monitor, just some junky old thing as an experiment.

They generally use the same LCD modules, so the job is almost identical. The advantage of a desktop display is that you have a little bit more room to work with when you're extracting the LCD module in the first place.

Andy Cuffe wrote in news: snipped-for-privacy@4ax.com:

You certainly don't have colorimetry,geometry alignment and convergence problems with LCD displays.

That's what I expected, but I'm happy to report than I've had more success fixing LCD monitors than I ever did with CRT monitors. The most common problems are simple things like bad caps and back light problems. The inverters can often be repaired (about half of them just have a blown fuse). I've never had to replace a CCF tube in a desk top monitor, but at least it's possible unlike when a CRT gets dim. Most LCD monitors are also much easier to take apart and work on than CRT monitors. There's no more rebuilding the deflection circuit only to have everything blow up again because the unobtainable flyback is bad. The best part is that LCDs are light weight and easy to handle compared to CRTs. Andy Cuffe

snipped-for-privacy@gmail.com

usually the inverter board is NOT "compressed into a compact module"... and many times can be repaired somewhat easily... backlights are not that hard to replace in most designs but one has to be careful, gentle and not "ham handed". Dan

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Yeh it was the room to work in that I was talking about. I replaced the inverter in my older Dell 15" and it was just an all around PITA.

err ccfls and inverter.

and also ... think of your eyes....

not every electron stops at the phosphorescent layer

you know, the electrons, from the gun(s), pointed at your head

hi, i tel ya know , tft monitors are no where as good as crt, crt have better depth of color , thats why graphic designers still use em

It's about the same really, there's not much difference in the panels themselves, the desktop displays just have a control board in there as well.

Huh? Electrons can't travel through the air, that's why even a tiny amount of air leaked into a vacuum tube will cause it to stop functioning.

Must have meant xrays.