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peterfares
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Last Activity: 10-04-2012, 12:28 PM
Joined: 08-11-2010
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    I believe the stuff on the regulator was from the capacitor, there is a little bit of it all around that capacitor. Do you think it is going to go out soon?
    Maybe the capacitor has nothing to do with what I did and is just a coincidence? I already put the whole monitor together without cleaning it up I'll have to do that some other day.
    I also got some annoying scratches under the Dell logo trying to figure out how to open the damn thing.
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    YES!
    I replaced the 3A fuse with a 3A tube fuse from RadioShack and the monitor works!

    Thanks for all your help!
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    It is a little hard to make out but it appears to be 960T65.

    Also is it possible to use the blade fuse or would that not work?
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    Does radio shack carry fuses? I can only find 250V fuses. Does the voltage only mean the maximum voltage?
    They appear to only have the glass fuses and the blade fuses.

    Also the "blown" regulator looks totally fine with the crap scraped off.
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    The capacitor says 47uF 25V on it. Would it be ok to replace it with a 47uF 16V I have lying around? Also does anyone know if the monitor should start without the USB board in place? Because it doesn't.
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On



    The 3A fuse shows 2000 ohms resistance. Is it good or blown? I already desoldered it because I thought it was blown since my dumb multimeter sucks so much.

    Also the voltage regulator on the USB board is showing the same resistance as the one that is supposedly fried.

    EDIT: Got the fuse back in easily. I thought it would be much more difficult than it was.

    EDIT 2: I was able to scrape that gunk off the "blown" voltage regulator and it came off fine. The part doesn't appear to be...
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    Last edited by peterfares; 08-12-2010, 05:33 PM.

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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    There is another voltage regulator on the USB board that is 3.3V (960T63). I wonder if they're the same... Also to help anyone in the future, the way to remove the bezel monitor is to pry it off by putting your finger near the actual panel and pulling up on it.
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    I tested the burned out piece. The only short is from the top pin to the middle pin on the bottom. The resistance across the pins varies from 5 to 60 ohms and also varies depending on which probe (positive or negative) I touch to which pin.

    Here are some very nice quality photos....
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    Last edited by peterfares; 08-12-2010, 04:27 PM.

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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    Alright, I will post higher quality photos when I get back home. I was in a rush this morning so I didn't have time to check the photos and see how they turned out. What can that burned out piece be? Is that a standard package that a lot of things are made to look like?
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    Please take a look at photo 3, at the top right of the logic board. There is a rectangular element with 3 pins on the bottom and one at the top. It looks very weird, sort of like it is slightly melted. I don't know if it is supposed to look like that or not. There is another thing like it on the other board in the same picture, but without the weird melted look.
    Is it possible for something to melt like that instantly? It was nearly instantaneous from when I shorted the pins and when the screen shut off.
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    Yes it is for the soundbar. What do surface mount fuses look like? The only fuse I know the shape of is the large one on the power supply. I tried putting only the 3 boards in (not the soundbar/USB hub board) but that didn't work either. I don't know if the soundbar/USB hub board does more than just that, though.

    I took these photos in a rush and it seems they aren't very good. I will take even better ones later today.
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    Last edited by peterfares; 08-12-2010, 09:01 AM.

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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    Here are better quality photos of my boards....
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    I have a crappy old analog multimeter, but the dial goes below 0, which is also what happens when I touch the two probes together.
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  • peterfares
    replied to Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays
    Re: Dell 2007WFP Won't Power On

    Hello,

    I am measuring the voltage at the connector going to the logic board. It is showing 18V across the pins in the picture. None of the other pins show voltage relative to any of the other pins on the connector.

    There is one fuse I found on the power supply and it has no resistance across the ends.

    I will upload more, higher quality photos tomorrow.

    Thank you!...
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  • peterfares
    started a topic Dell 2007WFP Won't Power On
    in Troubleshooting Computer Displays

    Dell 2007WFP Won't Power On

    Hello, I have a Dell 2007WFP that will not power on.

    What happened was I was plugging into the 12V output on the monitor and accidentally shorted the positive and negative on it. When that happened, the monitor instantly turned off and will no longer power on.

    I have taken it apart and I am getting voltage from the power supply, so I do not believe it is the issue. Is there any way to fix a logic board problem?

    Thank you.
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