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Dead u2410f, Any Ideas how to fix it?

post #1 of 10
10/7/12 at 11:31am
Thread Starter 
Hi,
My dad picked up a u2410f monitor that had a note on it that just simply said, "dead," from the discard room in his office building. So, he has handed it over to me and now it is my job to go and fix it. So far I have torn down the monitor to where I am able to get to the different boards, and I have tested the button to make sure it is not a bad button, and I tested and found the button is not faulty.

However, I have not went and probed anything else as I am not sure where to go from here. There is not any online service manual and no one is selling any of the boards from the monitor so, any ideas? The monitor does not power on at all, yet the power button does work without and failing and I have tested that the cord to plug in the monitor is good. So, ideas, advice if I should go towards dell for the fix? It is obviously out of warranty because we picked it up for free but I don't know what dell will do then, so advice?
Edited by Build It Fast - 10/7/12 at 3:09pm
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post #2 of 10
10/7/12 at 1:20pm
See what Dell wants to charge, but sounds to me that the lcd is dead.

You could take measurements and try to ebay a replacement lcd but I personally don't trust ebay.
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post #3 of 10
10/7/12 at 2:19pm
Thread Starter 
See to me it really doesn't seem like a dead LCD. i have dealt with that issue before, this isn't like that. Usually for a dead panel all the status indicator lights will still work, this nothing works... at all. Pressing the power button doesn't make anything change, for a dead panel the screen may not turn on but the power and status indicators would light.
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post #4 of 10
10/7/12 at 2:48pm
Quote:
Originally Posted by Build It Fast View Post

See to me it really doesn't seem like a dead LCD. i have dealt with that issue before, this isn't like that. Usually for a dead panel all the status indicator lights will still work, this nothing works... at all. Pressing the power button doesn't make anything change, for a dead panel the screen may not turn on but the power and status indicators would light.
I read the part where you said the power button worked. Please edit the OP and make it more clear.

You could look for a BenQ or Dell replacement PCM.
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post #5 of 10
10/7/12 at 3:12pm
Thread Starter 
Quote:
Originally Posted by wizardskill View Post

I read the part where you said the power button worked. Please edit the OP and make it more clear.
You could look for a BenQ or Dell replacement PCM.

Edited the OP, as you were right I should of said that, and I will look in to seeing if any are available, as i hope that will be it. All I can say is that the power module may or may not be working i can't tell because I have shocked myself by accidentally putting my hand on it while it was plugged in and I can't see anything damaged, but I haven't tested and there is no way to know what to test for with the output.
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post #6 of 10
10/7/12 at 3:29pm
Look for bad capacitors or blown output transistors. If there is no power at all, it's usually one of those.

The fact that you got shocked indicates that some of the caps may be charging, or able to hold their charge.
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post #7 of 10
10/7/12 at 3:54pm
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Quote:
Originally Posted by Cheezman View Post

Look for bad capacitors or blown output transistors. If there is no power at all, it's usually one of those.
The fact that you got shocked indicates that some of the caps may be charging, or able to hold their charge.

See the thing though is that my dad is an electrical engineer so as i was doing everything he had his head over my shoulder looking for himself, and he couldn't see any broken capacitors or burnt out transistors, at all.

That is what makes this weird. Although I wonder if there is anything on the bottom of the board it is possible I'm sure. Sorry, I am sure my responses here are somewhat frustrated but they just reflect how i am right now, especially as there is no way for me to contact dell as their live chat requires a service tag which this monitor lacks, and I am not getting on the phone right now. But seriously this is really strange.
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post #8 of 10
10/8/12 at 5:41am
Quote:
Originally Posted by Build It Fast View Post

See the thing though is that my dad is an electrical engineer so as i was doing everything he had his head over my shoulder looking for himself, and he couldn't see any broken capacitors or burnt out transistors, at all.
That is what makes this weird. Although I wonder if there is anything on the bottom of the board it is possible I'm sure. Sorry, I am sure my responses here are somewhat frustrated but they just reflect how i am right now, especially as there is no way for me to contact dell as their live chat requires a service tag which this monitor lacks, and I am not getting on the phone right now. But seriously this is really strange.

I'm not an electrical engineer, but, I have repaired LCD TVs before.

Did you actually test with a multimeter? Sometimes everything looks fine upon visual inspection.

http://www.squidoo.com/how-to-check-capacitor
http://www.wikihow.com/Test-a-Transistor

Also, I have to ask, but, did you check any fuses? I highly doubt it could be a blown fuse, but, you never know.
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post #9 of 10
10/8/12 at 11:16am
Thread Starter 
Quote:
Originally Posted by Cheezman View Post

I'm not an electrical engineer, but, I have repaired LCD TVs before.
Did you actually test with a multimeter? Sometimes everything looks fine upon visual inspection.
http://www.squidoo.com/how-to-check-capacitor
http://www.wikihow.com/Test-a-Transistor
Also, I have to ask, but, did you check any fuses? I highly doubt it could be a blown fuse, but, you never know.

We only tested the button with a multimeter, and the power coming in to the power module with a multimeter, so I think it would probably not be a bad idea to go through and check everything with the multimeter if it means getting a free nice monitor.

Also, as you said fuses I expected that maybe there would be a fuse in the monitor, but we couldn't fine any so not a blown fuse.
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post #10 of 10
10/8/12 at 11:26am
Quote:
Originally Posted by Cheezman View Post

Look for bad capacitors or blown output transistors. If there is no power at all, it's usually one of those.
The fact that you got shocked indicates that some of the caps may be charging, or able to hold their charge.

Quote:
Originally Posted by Cheezman View Post

I'm not an electrical engineer, but, I have repaired LCD TVs before.
Did you actually test with a multimeter? Sometimes everything looks fine upon visual inspection.
http://www.squidoo.com/how-to-check-capacitor
http://www.wikihow.com/Test-a-Transistor
Also, I have to ask, but, did you check any fuses? I highly doubt it could be a blown fuse, but, you never know.

^This. It most likely is a bad capacitor. I have a Samsung 245BW that I am working on, and upon initial inspection, the capacitors seem perfectly normal. However upon taking a closer look with a multimeter, it definitely seems to be the capacitors. I have already received a repair kit from LCD alternatives; hopefully my monitor will now be fixed with a bit of soldering.
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