-
--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file --- -
Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!
Comment
-
Re: Dell 1905FP Won't Turn On
PlainBill I connected a full set they didn't stay on long enough but at what I could see they were equally brightComment
-
Re: Dell 1905FP Won't Turn On
both transformers had the same results:
@.5 ohms at the primary and @450 ohms at the secondary.Comment
-
Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!Comment
-
Re: Dell 1905FP Won't Turn On
These readings suggest that the inverter transformer is likely good. However, I should point out that this test is not 100% accurate for reasons described by PlainBill at
https://www.badcaps.net/forum/showpo...39&postcount=9--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
-
Re: Dell 1905FP Won't Turn On
Excellent breakdown on inverter transformers!
I noticed no one mentioned the 2 transistors in the inverter circuit. Are they discounted for whatever reason.Comment
-
Last edited by retiredcaps; 04-12-2011, 04:36 PM.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
-
Re: Dell 1905FP Won't Turn On
I uploaded a number of photos of the boards.Attached FilesComment
-
-
Re: Dell 1905FP Won't Turn On
You have 4 transistors sandwiched in between the 2 transformers, but I can't make out the PCB designation because your photos are not clear enough.
They might be c5707s. You can test them "in circuit" without desoldering them for shorts. Measure the ohms between B-C, C-E, B-E. Any reading less than 30 ohms suggests a shorted transistor.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
--- end sig file ---Comment
-
Re: Dell 1905FP Won't Turn On
They are 13n07 4c37e. I checked them in circuit and they check out >30 ohms.Comment
-
Re: Dell 1905FP Won't Turn On
Any more ideas to help get this monitor up and running!Comment
-
Re: Dell 1905FP Won't Turn On
Does anyone have a replacement IPS board for sale for the Dell 1905FP?Comment
-
Re: Dell 1905FP Won't Turn On
q105 - G-D =12M, G-S = 17.4M, D-S =10.8K
q106 - G-D =13.5M, G-S = 17.5M, D-S =12K
q107 - G-D =14.8M, G-S = 17.3M, D-S =10.7K
q108 - G-D =14M, G-S = 17M, D-S =10.7KComment
-
Re: Dell 1905FP Won't Turn On
Could you try to get a better picture of the bottom side of the Inv/PS
Overall straight down without a flash, and more in focus?Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!Comment
-
Re: Dell 1905FP Won't Turn On
Here's a back and front of the board. The board was slightly tilted. I can reshoot if you need it. Ran out of time today. Thanks RichComment
-
Re: Dell 1905FP Won't Turn On
I am getting security token error uploading my photos. I'll try again tomorrow.Comment
-
Re: Dell 1905FP Won't Turn On
If you have a really good camera, that's 10m or better you're going to into your camera settings and reduce it down to about 5m.Then with some type of photo editor reduce the picture down to 2000x2000 that should allow you to post pictures using managed attachments.Whatever I do, I consider it a success, if in the end I am breathing, seeing, feeling and hearing!Comment
-
Re: Dell 1905FP Won't Turn On
For a small footprint photo editor and viewer, Viewprint Pro is hard to beat. And the price is right - free.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
-
My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?
Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?
My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
I have tried multiple different Dell power adapters. My Dell... -
I bought this p2210f dell monitor to fix. Schematic is the same as p2210.
Behaviour is that monitors comes on but then backlight switches off almost instantly. If I look with flashlight I can still find the "No signal message". So definitely a backlight issue. Trying to advance the issue I proved that the protection circuit is switching off the backlight by shorting out C3 and resistor to disable the INL chip then re enable by removing the short.
This is where it gets interesting. When I disassembled the monitor to solder leads on c3 capacitor I noticed the backlight flickered... -
Normally, I never post repairs this quick after I do them, because… I am usually very slow.
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...
-
Hello everyone,
I have been having some difficulties reviving an old Dell 2408WFPb PC monitor that I received for free. When I first acquired it, the backlights of the display were on but alas no image was showing. After extensive research on the topic, I went ahead and purchased a new t-con board for the monitor. After installing the board, I was then presented with a new screen that was half black and half green (more so black). I have been unable to figure out what to do next as I have limited knowledge of display electronics. Might anyone on this forum have an idea of what may... -
Hello everyone,
I have a Dell U3419W Monitor that has some thin stripes on a part of the screen since Tuesday.
This lines cover about a third of the screen and appear for 2 seconds before disappear for another 2 seconds.
This repeats the whole time. I have not opened the case yet cause I had no time, but will try to fix it on this weekend. For me, it looks like a problem on the TCon... Am I right?
Does someone have seen this before?...
Comment