FIXED IT!!! YEAH!!
I finally wired in the DC-DC converter. All voltages look good. Screen running well. I think I burned out the jumper when I still had the MOSFET connectoed to the board.
Here is a photo.
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thomaskuhn
Member
Last Activity: 08-16-2015, 02:04 PM
Joined: 09-03-2012
Location: Orlando, Fl
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Re: Another Dell 2405 FPW fails
FIXED IT!!! YEAH!!
I finally wired in the DC-DC converter. All voltages look good. Screen running well. I think I burned out the jumper when I still had the MOSFET connectoed to the board.
Here is a photo.
...
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Re: Another Dell 2405 FPW fails
I have taken another look at the power supply board. I powered it up and checked where I put the temporary jumper to use instead of the Littlefuse 5A fuse. 22V on one side and 0V on the other. Strange. I flipped over the board and quickly found out why. Burned in half. I am not sure when this happened.
I decided to trace where this goes after the fuse. It heads right out of the header and onto the logic board (red Wire) Thats why I was not seeing any voltage on that side. I have since stripped out some of the components similarly to...Leave a comment:
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Re: Another Dell 2405 FPW fails
Once again i looked at the other thread. He mentioned that he was getting 18v to feed into his dc-dc converter. I just checked a bunch of points in thst area and can not find anything at 18v.Leave a comment:
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Re: Another Dell 2405 FPW fails
Ok,
I have temporarily put a wire jumper to replace the fuse. I am trying to look at what the DC-DC converters are hooked to to get their source power. I removed the MOSFET, caps C9 and C8. I did not remove the coil yet. Where is the source coming in?Leave a comment:
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Re: Another Dell 2405 FPW fails
Ok,
I just finished rereading the Mirage00's thread again. I looked at the linkthat was posted regarding the blown Q1 and D17 Diode:
[url]http://www.cse.iitb.ac.in/soumen/Sysadm/Dell2405fpwRepair/[/url]
I went and tested those components... Both Blown! Along with the Fuse that missed before on the power supply side.
I guess I will do what everyone else is doing and get a DC to DC converter for powering the T-Con board.
Question, will I need to replace the fuse on the Power...Leave a comment:
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Re: Another Dell 2405 FPW fails
Ok,
I just got the cover off. To make it easier to put back in without dealing with the flex cable, I ended up trimming the metal a bit....Leave a comment:
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Re: Another Dell 2405 FPW fails
Good question...
I took out the screws and could leverage the side up enough to see the fuse (based on another picture) and could get my leads in there to test.Leave a comment:
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Re: Another Dell 2405 FPW fails
Let me see what i can do when i get back from work. I tried to remove the cover to the t-con but it is tricky because the tabs are underneath the main metal "screen cover". Does anyone know how to do it?
I saw about the mosfet and using a 5v power supply. Its funny that i think i have a 5v 3A board just like the person from the previous post. Would i be bypassing any other components that could have been powered from the possibly bad power supply that would still not function?Leave a comment:
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Re: Another Dell 2405 FPW fails
Thanks for the compliments on the photos. I have a Lumix LX-5 which is Great for closeup photos.
Here are the readings with nothing connected to the board:
Grey - 0V
Purple - 0V
Blue - 0V
Green - 7.28V
Yellow 0V
Orange - 0V
Red - 0V
Brown - 0V
Black - 0V
White - 0VLeave a comment:
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Another Dell 2405 FPW fails
Hi everyone,
I am new to the board but have been following the saga of Mirage00 and his Dell 2405 FPW display problems:
[url]https://www.badcaps.net/forum/showthread.php?t=21293&highlight=2405fpw[/url]
I too am having a very similar issue. The backlight comes on, the power buttons work, and the source select button is operating, but there is no display. So I began running the procedures you had recommended to Mirage00. I started with testing the voltage on the T-CONN board at the fuse with 0V on both sides and 0.2ohms across it.
I also tested... -
Re: New Members - please post your introductions here
Hi,
MY name is Tom and I am a Software engineer in Orlando Florida. I came across Badcaps.net in search of a solution to my monitor Woes. I am handy with a soldiering iron and can even do some simple SMT.Leave a comment:
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