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PCManiacpt
Member
Last Activity: 11-28-2012, 01:59 PM
Joined: 11-15-2012
Location: Santarem
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    I just recapped the HP L1740.

    After the recap, it looks to be working again, too.
    On this one I did change all the caps appart from the smaller ones and the biggest one.
    Now, I need to get a case for it as I didn't bring it home. xD

    But yea, success! =)

    Thank you all....
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    oh I see.

    I will keep that in mind, thank you selldoor. I will replace them all eventually once the things between me and RS gets worked on and I buy some smaller (but equivalent) caps, as I still have the space problem on the screen board and can't exactly use your suggestion on doglegging the cap.

    And yes, I had 2 monitors to fix, the second one (the HP) i'll work on it today and will report on later too.

    Thanks.
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    I went ahead and, before anyone replied any other idea, just soldered the panasonic cap in the place of the [b]visibly[/b] bad cap (that I didn't take a picture before).

    That was indeed the problem (apparently) and, since it works, i'll just keep it like that till it goes bad again.

    But still, please let me know how would you substitute the 2 at the left side of the power board, as I asked previously.

    Attached will be the pics I took after the substitution.
    As you can see on the pics, it looks like it's...
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.



    that's quite an interesting idea.
    I edited my previous post as I forgot to attach the picture....
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    Hey guys,

    Sorry for being quiet till now, but work didn't help and RS and me are having quite a time because they are having troubles to charge me.

    I only got the caps yesterday, they sent them while we resolve this issue.

    Now, I was confirming what I have to do and, it came to my attention that some of the caps are bigger than I though, and I don't quite have space for them.

    For example, on the LG screen (the attached picture), if you check the 2 left caps, they are both 1000uF - 25v (10x20mm)....
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    Last edited by PCManiacpt; 11-24-2012, 03:52 PM.

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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    I have been checking and Mouser offers half of the price of the other stores. But they charge 20€ of shipping (unless you spend 60€ or more, they "offer" the shipping). And they claim they deliver in 3 days (which isn't that bad for me)

    Farnel is the most expensive one and I couldn't get the shipping price yet.

    Digikey is the 2nd more expensive unless you buy 50 or more of the same item. at that point they almost beat Mouser. They charge 18€of delivery unless you put an 65€ or more order.

    RS...
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    Last edited by PCManiacpt; 11-17-2012, 10:19 AM.

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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    The links were just reference for what I had found out. I am yet to compare the prices. Just wanted to be sure I made reasonable choices.

    On the LG screen I have here to fix too, It has that 1000uF 25v cap. Hence why it's there. The HP screen uses indeed the 1000uF 16v cap.

    Edit: And thanks for your reply
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    Last edited by PCManiacpt; 11-17-2012, 07:46 AM.

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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.




    So I decided to get all the caps exchanged on the 2 monitors (appart from the biggest cap like selldoor said. Based on this quote, I made came up with this:



    Clickable links:[INDENT][URL="http://www.digikey.pt/product-detail/en/EEU-FM1E471/P12388-ND/613749"]EEUFM1E471[/URL]
    [URL="http://www.digikey.pt/product-detail/en/EEU-FM1E471L/P12389-ND/613750"]EEUFM1E471L[/URL]
    [URL="http://www.digikey.pt/product-detail/en/EEU-FM1H471/P12400-ND/613761"]EEUFM1H471[/URL]...
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.



    You are entirely correct. I quite forgot to check that out before removing the visibly bad caps off. *doh*!

    Back to when I got called to check what was wrong with the computers (the user allways says "the computer doesn't work!"..), both of them didn't turn on at all and I didn't notice any noise. Not even back to when I tested them at the informatics department. But I can't recall if the LED would turn on or not.

    Well, I'll make sure to take a note next time it happens. And well, if these don't work...
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    Ah, thanks mariushm.

    George Ortiz, unfortunately I don't have any sticker nor plastic casing, as I had to strip it down to the bare metal since I didn't wanted to be stuck at the security guards asking me questions about it. Even though My boss knows i took it home, this is supposed to be for learning and training. Making it work is a plus.

    I can show you a picture of the pcb though....
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    Sorry for double posting again, as the time limit for the edition doesn't let me edit the post.

    I was reading about the subject, to increase my knowledge and from what I have seen, there are capacitors low ESR and caps low Impedance. low Impedance ones are advised for AC circuits and ESR for DC circuits, am I right?
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    Thank you for your input guys.

    retiredcaps: I do know that. but I have bought some other components from one or 2 stores and I would consider them (the same 1 or 2 stores) to buy the caps. even if only to try the quality out.

    selldoor: yes, was a visual inspection. And thanks for the tp, will have it in consideration.

    mariushm: I will check the prices of the referenced websites by selldoor and afterwards I shall PM you. No, I don't have trust issues over the internet. Especially if it's over some couple of euros....
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    (oh god.. 6Am..)

    I have been searching and, I found some (few) stores but none of them say the brand on the webpage. I have inquired one of them, so I will be waiting.

    Other than those, I found out I can buy panasonic at farnell and digikey. should I avoid any of those stores?

    Thanks.
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    Thank you for your reply. It'll be usefull indeed.

    About brands I can get in my country, I have no real clue. Gotta see if I can find portuguese online stores.
    I was aiming at ebay but then I remembered it should be more reliable to buy them off badcaps.com.

    Gotta see what can I get at this side of the ocean.
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  • PCManiacpt
    replied to Some doubts I have.
    in Troubleshooting Computer Displays
    Re: Some doubts I have.

    Bummer.. Yeah I should have posted on the monitor section.. Sorry, my bad. x.x

    The HP looks like that one indeed.

    I was looking at this post: [url]https://www.badcaps.net/forum/showthread.php?t=23652[/url] and got a little dizzy trying to figure out the impedance and other things of the caps (I found out the chart for the su'scon SG series).

    For example, the 25v bad caps I have (470uF) are (aprox) 8x16 but those don't appear on the chart.. x.x

    The other is 10x20 (1000uF) 16v and that one is there.
    ...
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  • PCManiacpt
    started a topic Some doubts I have.
    in Troubleshooting Computer Displays

    Some doubts I have.

    Greetings everyone.

    So, like I have said on my introductory post, I have been stalking for information this forum.

    I have to repair 2 PC Screens (a LG L1730SF and an HP L1740).

    They are quite -old- and we were throwing them away, as the company we used to send them to be repaired were asking quite some money for each, to break down again after some months.

    After the math was done, it would be cheaper to buy newer screens (with 3yrs of warranty and all) than to keep sending the screens to be repaired.

    So, I got those 2...
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  • PCManiacpt
    replied to New Members - please post your introductions here
    in Announcements & Related News
    Re: New Members - please post your introductions here

    Greetings from Portugal.
    I'm a system administrator in one of the government's section and enthusiast for electronics.
    Have been "stalking" this forum for information (yes, I like to learn).

    Today, I register so I can take some doubts out of my head.

    PCManiac
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