BIOSTAR NF6IS Micro 754

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  • alindumitru46
    Badcaps Veteran
    • Aug 2015
    • 255
    • Romania

    #1

    BIOSTAR NF6IS Micro 754

    The mobo got 4bulging capacitors, BIOS battery discharged to 0V and a burned stick of RAM.
    I thought that I could go to repair after enough indications from @momaka in particular.
    I used my little arsenal of equipment and, after about 3 hours of work accumulated, I managed to remove three of capacitors. Out of frustration, I pulled off with such anger that capacitors was out but negative pins all remaining soldered.
    Last edited by alindumitru46; 02-20-2016, 02:52 AM.
  • alindumitru46
    Badcaps Veteran
    • Aug 2015
    • 255
    • Romania

    #2
    Re: BIOSTAR NF6IS Micro 754

    Another week end was reserved for pins extraction, 3 succesfully. I replaced the 3 capacitors and the fourth was solderd just to checking the mobo. Because the mobo started, I said to go over and fix annoyance and last capacitor.
    The mobo works perfect, but so much pain,too much labour, too much trials.

    Comment

    • TVRepairNoobie
      Senior Member
      • Feb 2015
      • 158
      • USA

      #3
      Re: BIOSTAR NF6IS Micro 754

      Good Job!! lessen learned, try to stay cool under pressure to cut down work time

      Comment

      • alindumitru46
        Badcaps Veteran
        • Aug 2015
        • 255
        • Romania

        #4
        Re: BIOSTAR NF6IS Micro 754

        Before and after.
        Attached Files

        Comment

        • momaka
          master hoarder
          • May 2008
          • 12170
          • Bulgaria

          #5
          Re: BIOSTAR NF6IS Micro 754

          Originally posted by alindumitru46
          The mobo works perfect, but so much pain,too much labour, too much trials.
          Boss, if everything was easy, life would be boring and we'd learn nothing .
          I struggled quite a bit too when I first started working on motherboards. So don't worry, you will get better as you do it more .

          That said, if you have a heat gun, you can use it to make the desoldering process a bit easier. Simply "pre-heat" the area of the board that you will be working on. Then, grab your iron and quickly work on the area that you just pre-heated. This is what I used to do for motherboards all the time back when I only had a 30 Watt iron. Took me several hours to replace the CPU caps on a Dell OptiPlex GX270 motherboard - talk about struggle.

          Speaking of which, you probably will have to recap this motherboard again in the future. The Ltec caps you used likely won't last more than 2-3 years - and that's if you keep them cool.

          But hey, Ltec or not... a working motherboard is better than a dead motherboard!

          Comment

          • alindumitru46
            Badcaps Veteran
            • Aug 2015
            • 255
            • Romania

            #6
            Re: BIOSTAR NF6IS Micro 754

            I got capacitors from the owner, although I advised him to buy quality capacitors.

            Comment

            • Wester547
              -
              • Nov 2011
              • 1268
              • USA.

              #7
              Re: BIOSTAR NF6IS Micro 754

              Originally posted by momaka
              Speaking of which, you probably will have to recap this motherboard again in the future. The Ltec caps you used likely won't last more than 2-3 years - and that's if you keep them cool.
              Those aren't Ltec, those are Lelon RGA series (at least those are the green ones that I've seen), which as far as I'm concerned halves their life to 1-2 years of light and "cool" load. Lelon is an even worse brand and those are general purpose capacitors. You are correct in saying that LTEC's equivalent (LMB series) won't last long at all, but almost anything will do better than those 3300uF 6.3V KZGs... except certain KZJs maybe, and Sacon FZ and SZ. But what's that saying exactly?
              Last edited by Wester547; 02-21-2016, 10:24 AM.

              Comment

              • momaka
                master hoarder
                • May 2008
                • 12170
                • Bulgaria

                #8
                Re: BIOSTAR NF6IS Micro 754

                Originally posted by Wester547
                Those aren't Ltec, those are Lelon RGA series
                Indeed. I guess my brain had a fart (or something along that line).

                Originally posted by Wester547
                You are correct in saying that LTEC's equivalent (LMB series) won't last long at all, but almost anything will do better than those 3300uF 6.3V KZGs...
                Which is rather sad.

                Originally posted by Wester547
                ... except certain KZJs maybe, and Sacon FZ and SZ. But what's that saying exactly?
                It's saying, you forgot to mention Rulycon
                I'll still pick Rulycon over Sacon, though!
                Last edited by momaka; 02-22-2016, 11:38 PM.

                Comment

                • Stefan Payne
                  Badcaps Legend
                  • Dec 2009
                  • 1267
                  • Germany

                  #9
                  Re: BIOSTAR NF6IS Micro 754

                  Originally posted by Wester547
                  Those aren't Ltec, those are Lelon RGA series
                  If those are really Lelon RGA, than it seems they are not the right choice for CPU VRM filtering caps as they are general purpose caps oO

                  The specs of those caps say that they can endure 840mA of ripplecurrent...

                  The KZGs are specced for 2800mA with 12Ohms of ESR...


                  And lelon themselves say:
                  If there is any requirement on ESR, it's suggested to use low
                  ESR series instead of RGA. Please consult us for any inquiry.

                  Comment

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