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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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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 ! ! |
#2
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On Mar 26, 9:27 pm, wrote:
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 ! 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. Darn ! ! |
#3
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![]() wrote in message ups.com... 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 ! ! some repairer you are, can't fix a simple backlight. |
#4
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#6
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James Sweet wrote:
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. The lifespan of the tubes in CRT monitors has gotten so short, too. A few years ago, I used to work at a place where we still ran Windows NT. NT has no concept of power saving modes so the monitors generally were just run 24/7. They'd last about two or three years before the contrast got too bad to use them anymore. Some factory in China has figured out how to make a filament that will cook off all its high-energy electrons during the warranty period. ![]() |
#7
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On 26 Mar 2007 21:27:15 -0700, wrote:
|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..... -- Triad Productions-Fantalla©~EZine~ParaNovel National Astrophysical Assault Research http://lacasse.naar.be http://ammo.at/lacasse |
#8
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#9
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Posted to alt.comp.hardware.pc-homebuilt,sci.electronics.repair,alt.comp.hardware
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On 26 Mar 2007 21:27:15 -0700, wrote:
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 ! ! 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 |
#10
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Andy Cuffe wrote in
: On 26 Mar 2007 21:27:15 -0700, wrote: 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 ! ! 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 You certainly don't have colorimetry,geometry alignment and convergence problems with LCD displays. -- Jim Yanik jyanik at kua.net |
#11
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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 |
#12
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jonpi wrote:
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 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. |
#13
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James Sweet wrote in
news:tcoOh.5618$Qi2.2424@trndny07: jonpi wrote: 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 Huh? Electrons can't travel through the air, At typical TV set accelerating voltages,they aren't going to penetrate the faceplate,either. that's why even a tiny amount of air leaked into a vacuum tube will cause it to stop functioning. He's been sitting too close to the TV set again. -- Jim Yanik jyanik at kua.net |
#14
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jonpi wrote:
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 Heh heh...each monitor is your own little particle accelerator. ![]() ones with the little hole burned in the middle of the screen drive home the point the best, I think. |
#15
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On 27 Mar, 19:07, Jim Yanik wrote:
Andy Cuffe wrote : On 26 Mar 2007 21:27:15 -0700, wrote: 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. an easy fix IME You certainly don't have colorimetry,geometry alignment and convergence problems with LCD displays. Colorimetry issues are severe with lcds. Move your head to the side a bit and the colour goes way off on mine - theyre old - the advantage is theyre unfixable, so no need to waste any time. CRTs win on almost all points technically, except for resolution, the slimness and light weight of tfts is about the only advantage. NT |
#16
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#17
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David Brodbeck wrote:
wrote: CRTs win on almost all points technically, except for resolution, the slimness and light weight of tfts is about the only advantage. Also low power consumption, low heat generation, and immunity to magnetic fields. You can put two LCDs next to each other without them making each others' pictures wobble and squirm. ![]() And some of the new ones really have excellent pictures, viewing angle has improved tremendously too. I still say a *good* CRT wins for me, but I'm a demanding user and often use different resolutions, something a flat panel is not good at, but for the average user a good LCD with DVI input will be better hands down. Geometry and convergence are dead on, zero flicker, perfectly flat, square, light, thin, it's no mystery why they're so popular. |
#18
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#19
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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 - - - - - - - - - - - wrote in message ups.com... 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 ! ! |
#20
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On Mar 28, 3:56 am, "Sofie" wrote:
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 - - - - - - - - - - - wrote in message ups.com... 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 ! ! Reading your reply and those from several others here really give me a glimpse of hope. Perhaps I'm just to dim, all the LCD that die here have the same problem - Backlights gone kaput ! When I try to replace the backlights, I found that they are glued tightly with the whatever (tftlcd and lightguards) and how can I replace anything if they are glued up like that. That said, I'm still interesting in knowing how to actually replacing the backlights. If there's any sites that have these kinds of intructions, I'd very much like to know about it. Thanks to you and to all ! Happy Easter ! |
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