Metal Housing with boards D
Ok yes this powerswitch is still yellow after if fires up. I do remember it was green when I tested the monitor assembled.
Is this a question or an answer? Only the screw holes on the lcd controller look logical to ground.
""but if you have everything grounded to the powersuply ground
then you only have 1 choice and thats to put it back together and try it
if it still dosent work,then there was some damage caused in
the dissasembly ""
I dont know? According to the photos does it look like everything is grounded to the power supply? I am thinking now the only thing that is grounded is the power switch? And this is grounded to the metal housing not the power supply. The boards in the housing do not have any copper contact points. So where do I ground?
I tried ground the lcd controller board to
every board seperately and no go.
I dont think there was damage during the dissambly I was very carefull but it is possible?
Why would the backlight come one for only 3 seconds and then off. Is that not a sign of improper grounding?
Ok yes this powerswitch is still yellow after if fires up. I do remember it was green when I tested the monitor assembled.
Is this a question or an answer? Only the screw holes on the lcd controller look logical to ground.
""but if you have everything grounded to the powersuply ground
then you only have 1 choice and thats to put it back together and try it
if it still dosent work,then there was some damage caused in
the dissasembly ""
I dont know? According to the photos does it look like everything is grounded to the power supply? I am thinking now the only thing that is grounded is the power switch? And this is grounded to the metal housing not the power supply. The boards in the housing do not have any copper contact points. So where do I ground?
I tried ground the lcd controller board to
every board seperately and no go.
I dont think there was damage during the dissambly I was very carefull but it is possible?
Why would the backlight come one for only 3 seconds and then off. Is that not a sign of improper grounding?
Attachments
all the grounds look good
the only thing i dont like is the horizontal driver board on the lcd bent backwards and the lcd sitting on the ribbons
i would sugest you put the monitor back together and see if it still works if it does take a good look at where all the grounds are connected and try again
it does sound like a grounding isue but make sure the monitor still works and try to pinpoint your grounds thruout the housing
the only thing i dont like is the horizontal driver board on the lcd bent backwards and the lcd sitting on the ribbons
i would sugest you put the monitor back together and see if it still works if it does take a good look at where all the grounds are connected and try again
it does sound like a grounding isue but make sure the monitor still works and try to pinpoint your grounds thruout the housing
dracul said:
No it uses a chi mei, but it has the same controller (proberly different firmware)
This LCD panel has both a horizontal and vertical driver boards.
""all the grounds look good
the only thing i dont like is the horizontal driver board on the lcd bent backwards and the lcd sitting on the ribbons""
The horizontal driver board came with it bent another 90 degrees up from where you see it now. Another words parallalel to the lcd screen but yes I should take the weight off the ribbons.
""i would sugest you put the monitor back together and see if it still works if it does take a good look at where all the grounds are connected and try again
it does sound like a grounding isue but make sure the monitor still works and try to pinpoint your grounds thruout the housing""
I tried putting it back together but was missing some parts that I dont remember how it went together.
How do I pinpoint the grounds? Since I left the 3 other boards in the metal housing I figured they should be grounded no?
You can see the parts are very simple and few. If there was damage where and what do you think got damaged? The video board? If the ribbon cables got damaged would I not see the damage? Also would not all of them have to be damaged to see no fire up on the lcd at all?
Is there a way to test that the boards are all working still?
the only thing i dont like is the horizontal driver board on the lcd bent backwards and the lcd sitting on the ribbons""
The horizontal driver board came with it bent another 90 degrees up from where you see it now. Another words parallalel to the lcd screen but yes I should take the weight off the ribbons.
""i would sugest you put the monitor back together and see if it still works if it does take a good look at where all the grounds are connected and try again
it does sound like a grounding isue but make sure the monitor still works and try to pinpoint your grounds thruout the housing""
I tried putting it back together but was missing some parts that I dont remember how it went together.
How do I pinpoint the grounds? Since I left the 3 other boards in the metal housing I figured they should be grounded no?
You can see the parts are very simple and few. If there was damage where and what do you think got damaged? The video board? If the ribbon cables got damaged would I not see the damage? Also would not all of them have to be damaged to see no fire up on the lcd at all?
Is there a way to test that the boards are all working still?
Ok. Ace3000 or someone can you please tell me how you want me to try to hookup the wire grounds. You want me to to hook from lcd board to the video board then take another from video board to the power board then yet another from the power board to the backlight board?
There are no copper points on the screw sections of any of the 3 boards in the metal housing. I thought this was necessary for grounding.
There are no copper points on the screw sections of any of the 3 boards in the metal housing. I thought this was necessary for grounding.
Attachments
Or should I run a wire from each board to the common default grounding point under the metal housing shown in a previous photo?
Energy Saver mode
Forgive me for being so simplistic...
I don't have an lcd monitor, I have never stripped one. I am, however, looking at the Dell and following this thread closely, so please forgive my simplicity.
Whenever my monitors go into sleep mode the power light turns yellow, I seem to recall you sayting the light was yellow when you power the monitor. Mine does this when there is no signal as well. I know you have checked all this million times, but maybe this will spark your thinking for something else.
Forgive me for being so simplistic...
I don't have an lcd monitor, I have never stripped one. I am, however, looking at the Dell and following this thread closely, so please forgive my simplicity.
Whenever my monitors go into sleep mode the power light turns yellow, I seem to recall you sayting the light was yellow when you power the monitor. Mine does this when there is no signal as well. I know you have checked all this million times, but maybe this will spark your thinking for something else.
Hah! If it could only be that simple. I am willing to bet my dogs life that there is a signal and the problem is something else. Although I have to say there are only two things that make sense. Grounding and no signal. I am at a loss to what to do next.
$430 usd would really put me off diy lcd projectors and that does not include the lenses and light which I will do what with now?
Risk another lcd dismantle???
Can I use the parts to make something else?
Come on guys, save me!!!
Please help.
$430 usd would really put me off diy lcd projectors and that does not include the lenses and light which I will do what with now?
Risk another lcd dismantle???
Can I use the parts to make something else?
Come on guys, save me!!!
Please help.
dracul
dracul try this, the ribbon cables have to be clampted by the small clamp on the ribbon cable sockets, are they all clamped? if not that will be a problem forsure and maybe the problem in this case, the reason i say this is that its a common mistake and ive even done it my self lol so make sure when u put a ribbon cable in the socket clamp it with the small clamp, they just click in, also if one is broken thats a big problem cos they have to be clamped to work other wise no go. ask negative design on that one.
Trev
p.s your grounding looks ok from what i can see in your last pic
dracul try this, the ribbon cables have to be clampted by the small clamp on the ribbon cable sockets, are they all clamped? if not that will be a problem forsure and maybe the problem in this case, the reason i say this is that its a common mistake and ive even done it my self lol so make sure when u put a ribbon cable in the socket clamp it with the small clamp, they just click in, also if one is broken thats a big problem cos they have to be clamped to work other wise no go. ask negative design on that one.
Trev
p.s your grounding looks ok from what i can see in your last pic
I am confused. I thought ribbon cables are the fragile transparent things that attach to the lcd screen itself from the lcd controller board. There is no sockets or option for connect so you must be calling the white flat IDE looking cables ribbon cables.
IF that is what you mean, such as the white cable connecting to the lcd controller board then ok. I will try clamping that with a small clamp. There was no clamp when I took it apart but there was some white soft rubber like stuff stuck to the socket to secure the connection.
I thought it might be the connection thing so I pushed the cables
in firmly but that was not it either. But ok, I will try the clamps. I am worried because the plastic is very fragile there. The white socket section of a cable was soft. The small cables came out of the socket holder when I just detached the cable from the other board. No damage. I could insert the small thin cables back in the socket holder but if the plastic breaks.....
dracul said:
They are.
On some monitors, the ribbon cables are soldered directly to the PCB's, where as others, you stick them in and "clamp" them to little sockets.
In this case, you should carefuly chech the ribbon cables for tears.
GREEN LIGHT!!!
Ace3000 I think you are my saviour. I decided to check the white IDE type cables that join the boards together like you said.
Last time I pulled the socket cable from the video input board some of the thin cables came out from the plastic socket frame again because like I said the thing is very fragile made of soft plastic. Very crappy actually.
Anyway, I placed each cable back in the socket holder carefully making sure wire 1 goes into hole 1 from right to left and so on.
I then also double checked the white cable is firmly pushed into the backlight board(although I think this was not the problem)
I fire it up without the vga cable attached and I get a yellow light as usual and 2 seconds later turns green. The backlight stays on this time permanently.
The lcd screen was configured to face down so I could not actually see an image but I could see the light easily.
I then decided to feed it a signal by pluging in the vga cable to it and firing up the pc. I waited a bit then turned off the pc and noticed the green light on the monitor turned yellow for no signal as normal. Turned the pc back on and the yellow light turns green once again.
So I am assuming green light means everything works 100% including the lcd screen itself. I will check this now but was too excited to let you guys know of the good news.
Ace3000 I think you are my saviour. I decided to check the white IDE type cables that join the boards together like you said.
Last time I pulled the socket cable from the video input board some of the thin cables came out from the plastic socket frame again because like I said the thing is very fragile made of soft plastic. Very crappy actually.
Anyway, I placed each cable back in the socket holder carefully making sure wire 1 goes into hole 1 from right to left and so on.
I then also double checked the white cable is firmly pushed into the backlight board(although I think this was not the problem)
I fire it up without the vga cable attached and I get a yellow light as usual and 2 seconds later turns green. The backlight stays on this time permanently.
The lcd screen was configured to face down so I could not actually see an image but I could see the light easily.
I then decided to feed it a signal by pluging in the vga cable to it and firing up the pc. I waited a bit then turned off the pc and noticed the green light on the monitor turned yellow for no signal as normal. Turned the pc back on and the yellow light turns green once again.
So I am assuming green light means everything works 100% including the lcd screen itself. I will check this now but was too excited to let you guys know of the good news.
Oh I forgot the most important thing. Of course I played around connecting disconnecting things many times over many days but the very first time I took things apart some of the thin wires of white socket of the video input board came out. I put them back in but not thinking this crap matters, I did not pay attention to put cable 1 into hole 1 and so on....
The entire time I was messing around trying different things, grounding issues etc... this cable stayed connected like this until it came apart again yesterday morning and was necessary to connect again.
I want to appologize to everyone for being an idiot and waisting peoples time with this. I should have turned my brain on and all of this would have been avoided.
I knew it all along that it was something simple and idiotic that I was missing.
this crap matters, I did not pay attention to put cable 1 into hole 1 and so on....The entire time I was messing around trying different things, grounding issues etc... this cable stayed connected like this until it came apart again yesterday morning and was necessary to connect again.
I want to appologize to everyone for being an idiot and waisting peoples time with this. I should have turned my brain on and all of this would have been avoided.
I knew it all along that it was something simple and idiotic that I was missing.
Yup. I got an image!!!😀
Next I need to clean the residue crap off the back of the lcd after pulling the polarizer filter.
😀 😀 😀 😀 😀 😀
It works!!!😀 😀 😀 😀
Next I need to clean the residue crap off the back of the lcd after pulling the polarizer filter.
😀 😀 😀 😀 😀 😀
It works!!!😀 😀 😀 😀
dracul
GOOD ON YA BUD!!!!
at least its going now and u are off to another start, so what was the problem in the end? im confused on all of the stuff u said about what was being what problem lol anyway we all make mistakes dracul dont feel like a fool, this does happen to people from time to time and realy this has been a good thread for noobs and others if their lcd stops working after the big pull apart, and we all have learnt abit in here i think about this, just be jentle now and take your time and dont flex the ribbon cables ( white / brown flex cables) too darn much or then u will realy be in the poop
Best of luck
Trev
GOOD ON YA BUD!!!!
at least its going now and u are off to another start, so what was the problem in the end? im confused on all of the stuff u said about what was being what problem lol anyway we all make mistakes dracul dont feel like a fool, this does happen to people from time to time and realy this has been a good thread for noobs and others if their lcd stops working after the big pull apart, and we all have learnt abit in here i think about this, just be jentle now and take your time and dont flex the ribbon cables ( white / brown flex cables) too darn much or then u will realy be in the poopBest of luck
Trev
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