Hi all,
It's been a while since I received those boatloads of help fixing my Dell 2407WFP monitor, and, I'm back! This time, through the aid of the wonderful FAQs here, I've diagnosed the problem and not yet had to lift a soldering iron. Which is kind of a shame, I like soldering...
Anyhow, I recently acquired a faulty Dell P2210t from a client. It originally gained our attention when the backlight was subtly flickering. Dell, being Dell, refused to warranty it - claiming they couldn't see the flickering on the video they had insisted I record for them. So I decided to drive it all day every day until it failed, and THEN warranty it. It was just a matter of time. A few weeks later, I visited the client again and it's not showing a picture. Re-powering it shows the all-too-common two-seconds-to-black problem. Success! But, by that time my client decided exceeding my costs would be more than those of just buying a replacement.
So what started as a mild flicker eventually devolved into the two-seconds-to-black problem. I pulled it apart, made a budd light (hah, get it?) out of an energy saver bulb which I'd taken a saw to, and then did some testing. Unfortunately, this was inconclusive seeing as I only made one, and this monitor uses two CCFLs. On a whim, I figured I wouldn't mind losing an old Samsung Syncmaster 740N I had lying around, and decided to make use of its backlighting. So I disassembled that and to my good fortune found that its CCFLs use the same plugs as this P2210t. So I plugged it right in - see the first image attachment. Two-seconds-to-black problem gone!
The top half of the screen in that photo is dark - I only plugged the Dell into two of its CCFLs - whereas the Samsung has four. I inspected the interface and power supply boards and they both look fine, going by my very amateur assessment. I further disassembled the LCD panel, and found what you see in the second and third attachments - one of the ends of the CCFL is scorched. I also found that the other CCFL was broken - I probably did that in a ham-fisted disassembly attempt. No real loss, as I can only find replacements in pairs. I've taken those out, ordered replacements and reassembled the monitor for now.
For reference, this monitor uses a LG LCD panel - model number LM220WE1.
I have also attached some reference pictures of the boards inside - I hope they're of use to someone. These were originally taken to see if the educated eyes of the forums can spot anything, but it turns out that's not necessary.
It's been a while since I received those boatloads of help fixing my Dell 2407WFP monitor, and, I'm back! This time, through the aid of the wonderful FAQs here, I've diagnosed the problem and not yet had to lift a soldering iron. Which is kind of a shame, I like soldering...
Anyhow, I recently acquired a faulty Dell P2210t from a client. It originally gained our attention when the backlight was subtly flickering. Dell, being Dell, refused to warranty it - claiming they couldn't see the flickering on the video they had insisted I record for them. So I decided to drive it all day every day until it failed, and THEN warranty it. It was just a matter of time. A few weeks later, I visited the client again and it's not showing a picture. Re-powering it shows the all-too-common two-seconds-to-black problem. Success! But, by that time my client decided exceeding my costs would be more than those of just buying a replacement.
So what started as a mild flicker eventually devolved into the two-seconds-to-black problem. I pulled it apart, made a budd light (hah, get it?) out of an energy saver bulb which I'd taken a saw to, and then did some testing. Unfortunately, this was inconclusive seeing as I only made one, and this monitor uses two CCFLs. On a whim, I figured I wouldn't mind losing an old Samsung Syncmaster 740N I had lying around, and decided to make use of its backlighting. So I disassembled that and to my good fortune found that its CCFLs use the same plugs as this P2210t. So I plugged it right in - see the first image attachment. Two-seconds-to-black problem gone!
The top half of the screen in that photo is dark - I only plugged the Dell into two of its CCFLs - whereas the Samsung has four. I inspected the interface and power supply boards and they both look fine, going by my very amateur assessment. I further disassembled the LCD panel, and found what you see in the second and third attachments - one of the ends of the CCFL is scorched. I also found that the other CCFL was broken - I probably did that in a ham-fisted disassembly attempt. No real loss, as I can only find replacements in pairs. I've taken those out, ordered replacements and reassembled the monitor for now.
For reference, this monitor uses a LG LCD panel - model number LM220WE1.
I have also attached some reference pictures of the boards inside - I hope they're of use to someone. These were originally taken to see if the educated eyes of the forums can spot anything, but it turns out that's not necessary.
Attached Files
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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