Cornea mp503...
I disassembled the monitor, but when i was removing the backlight, the flex cable that attached to the side slid out of its coupling. It looked like a little connector that i figured would be anchored in but the cable slid right out easy. I am very disheartened, as i thought this model didnt need flex cable work, but when i opened it up it did.
Anybody think it will still work?
I disassembled the monitor, but when i was removing the backlight, the flex cable that attached to the side slid out of its coupling. It looked like a little connector that i figured would be anchored in but the cable slid right out easy. I am very disheartened, as i thought this model didnt need flex cable work, but when i opened it up it did.
Anybody think it will still work?
If the cable is in one piece and the sides are still attached to the pcb... it should. You may have broken the snap that holds the connection in place. If thats all you did... it should be easy to fix.
It's hard to say exactly what happened without seeing it.
It's hard to say exactly what happened without seeing it.
I have seen most of ribbon cables can be slid in and out as many times as you want before you bend the ends. There are usually two snapping little things at the end of the connector which you if lift will give more room for you to push the flat cable in and then snap them back.
Is there any way you can take a picture of it so I can see exactly what happened? Did you cut it? did it break!?
I will try to take some pictures today.
I want to extend that cable. I think thigns should work, but I am a pessimist.
I want to extend that cable. I think thigns should work, but I am a pessimist.
If the wire is still in one piece you should be fine.
Being a pessimist while making a DIY projector doesnt exactly mix very well 🙂
Being a pessimist while making a DIY projector doesnt exactly mix very well 🙂
Having a pessimist with a big mouth standing over your shoulder while putting together a DIY projector is even worse.
Having a pessimist with a big mouth standing over your shoulder while putting together a DIY projector is even worse.
Apparently, you know my wife too!😉
Apparently, you know my wife too!😉
Hmm, I guess I'll introduce myself by getting in on this thread.
I REALLY broke my LCD panel. It was an Envision EN-5200ei. I ordered it online thinking it was an Envision EN-5200e, which was apparently really, really easy to disassemble. I unpacked it, made sure that it worked, and started taking it apart. I soon noticed that it had the whole "two boards on the sides separated by a small flex cable thing" going for it.
Not one to be disheartened by such setbacks, I tested it again, it worked, then I removed the backlight, leaving the obscuring boards in place, and put it on my 30$ salvage projector to test it. It was beautiful. Even with the slightly yellow light coming out of the projector, it had rich blues, reds, and greens. I ended up watching a movie on the part of the screen I could see.
The next day I set about doing what I could on the problem with the flex cable. It had .25mm leads, so I got some solder-weld and some 30 gauge wrapping wire and set in on it. After some experimentation, I found the best way to solder the leads onto the flex cable without crossing anything was to scrape the orange coating off of the cable in an alternating pattern for each lead, and solder to the points I made. I continuity checked the entire thing time and time again, and it worked fine, so I decided to plug it in.
I put it on my projector, and power it up. At this point it is mounted on a piece of foam-core with a hole in it due to my distinct lack of Plexiglass. I power it up, and see vertical lines going across the screen, so I fiddle with the connector to the vertical part (the cable I soldered), and WOW, it WORKED! I had a clear, beautiful image for about 5 seconds, but then lost the signal entirely. The projector then decided to overheat. I took the panel off, fanned the projector down, and tried again. Nothing, nada, nope. I wasn't getting anything at all on the screen.
I started to see what was powered and what was not using a multimeter. It MIGHT have been that I shorted something with my multimeter trying to figure out what was wrong, but I think that something happened before this to break it. I never even got the vertical lines again. I started voltage-testing the various leads, and decided the vertical part of the panel wasn't getting power any more, meaning something was probably borked on the horizontal board, which is getting power.
So, my friends, should I chalk this one up as experience, or is there any way I can diagnose and possibly fix this?
I REALLY broke my LCD panel. It was an Envision EN-5200ei. I ordered it online thinking it was an Envision EN-5200e, which was apparently really, really easy to disassemble. I unpacked it, made sure that it worked, and started taking it apart. I soon noticed that it had the whole "two boards on the sides separated by a small flex cable thing" going for it.
Not one to be disheartened by such setbacks, I tested it again, it worked, then I removed the backlight, leaving the obscuring boards in place, and put it on my 30$ salvage projector to test it. It was beautiful. Even with the slightly yellow light coming out of the projector, it had rich blues, reds, and greens. I ended up watching a movie on the part of the screen I could see.
The next day I set about doing what I could on the problem with the flex cable. It had .25mm leads, so I got some solder-weld and some 30 gauge wrapping wire and set in on it. After some experimentation, I found the best way to solder the leads onto the flex cable without crossing anything was to scrape the orange coating off of the cable in an alternating pattern for each lead, and solder to the points I made. I continuity checked the entire thing time and time again, and it worked fine, so I decided to plug it in.
I put it on my projector, and power it up. At this point it is mounted on a piece of foam-core with a hole in it due to my distinct lack of Plexiglass. I power it up, and see vertical lines going across the screen, so I fiddle with the connector to the vertical part (the cable I soldered), and WOW, it WORKED! I had a clear, beautiful image for about 5 seconds, but then lost the signal entirely. The projector then decided to overheat. I took the panel off, fanned the projector down, and tried again. Nothing, nada, nope. I wasn't getting anything at all on the screen.
I started to see what was powered and what was not using a multimeter. It MIGHT have been that I shorted something with my multimeter trying to figure out what was wrong, but I think that something happened before this to break it. I never even got the vertical lines again. I started voltage-testing the various leads, and decided the vertical part of the panel wasn't getting power any more, meaning something was probably borked on the horizontal board, which is getting power.
So, my friends, should I chalk this one up as experience, or is there any way I can diagnose and possibly fix this?
The problem your describing sounds like the cables connecting the pcb to the LCD itself. If there was a problem with the flex cable You A. wouldnt get a picture or B. would only have half an image on the screen...
It sounds like you handled the monitor a little too much. Check the leads and make sure none of them broke.
If you get a clean picture... even for a second... it can be fixed.
BTW... did the solder weld make it easier for you to extend the flex cable? I recommended this method to people on the boards because it was a hell of alot easier for me at least then using regular solder.
It sounds like you handled the monitor a little too much. Check the leads and make sure none of them broke.
If you get a clean picture... even for a second... it can be fixed.
BTW... did the solder weld make it easier for you to extend the flex cable? I recommended this method to people on the boards because it was a hell of alot easier for me at least then using regular solder.
Thanks for the reply. I inspected the PCB-to-panel connections really closely, and there seems to be no damage to any of them.
An odd thing is that one of my signal wires (the four tiny ones that appear on most of those cables) seems to have developed a grounding-out problem, possibly indicating a problem with the flex cable that can be remedied by recutting it and being more careful with the application of heat.
I know the mainboard is still intact and sending signals, as the on-board signal processor definitely recognizes when it has a signal or not.
First off, is there a good way to check if the signal wires directly attached to the Panel are still internally intact? Secondly, to answer your question, yes, the solder weld really cut down on the complexity of the soldering process. So did staggering the connections on the severed end of the flex cable. Any other help would be greatly appreciated.
An odd thing is that one of my signal wires (the four tiny ones that appear on most of those cables) seems to have developed a grounding-out problem, possibly indicating a problem with the flex cable that can be remedied by recutting it and being more careful with the application of heat.
I know the mainboard is still intact and sending signals, as the on-board signal processor definitely recognizes when it has a signal or not.
First off, is there a good way to check if the signal wires directly attached to the Panel are still internally intact? Secondly, to answer your question, yes, the solder weld really cut down on the complexity of the soldering process. So did staggering the connections on the severed end of the flex cable. Any other help would be greatly appreciated.
It could be a grounding issue... but I cant see how the monitor would even get picture if that was the case.
As for heat... the PCB can take temps up to 375 degrees for up to 3 seconds. So unless you really fried the flex cable I cant see how it damaged the board.
The flex cable is wired like so... data, ground, data, ground, etc, etc... so maybe one of the welds are loose and when you mount it on your OHP or in your projector box its touching the ground.
I dont think you have to re-solder all of the lines... but check to make sure that the leads arent loose on the flex cable.
I dont know of a way to check the leads from the PCB to the LCD... except by carefull inspection.
As for heat... the PCB can take temps up to 375 degrees for up to 3 seconds. So unless you really fried the flex cable I cant see how it damaged the board.
The flex cable is wired like so... data, ground, data, ground, etc, etc... so maybe one of the welds are loose and when you mount it on your OHP or in your projector box its touching the ground.
I dont think you have to re-solder all of the lines... but check to make sure that the leads arent loose on the flex cable.
I dont know of a way to check the leads from the PCB to the LCD... except by carefull inspection.
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