Samsung Syncmaster 245b - Testing resistors

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Ruffles
    New Member
    • Dec 2011
    • 2

    #1

    Samsung Syncmaster 245b - Testing resistors

    Good afternoon,

    Seems all my searching on this problem always leads me to these boards - clearly the people here know what they're doing. Anyways, my monitor has gone the journey, it's recognised by windows, blue power light is on fine, but no display... I've done a bit of reading and a common factor seems to be certain resistors on the power board. I've checked the fuses that I can see and they're fine, and it appears that the popular resistors aren't at fault, but I'd like to double check that.

    I've uploaded a photo of the power board (both sides - particularly the resistor area), and have shown the points on the underside where there is continuity. I'm no electrical engineer, but I'm assuming I'm getting the continuity in all the right places. So, if somebody wouldn't mind checking this for me and if this is okay possibly give some guidance on where to look next.

    I'm assuming it is some sort of glue, but in the fourth picture (ending 3rb), the resistors have what looks like dried gunk (yeah, my vocabulary is that good), although it is rock hard.

    Actually, my photos aren't too good quality (rubbishy camera), so rather tha reduce the quality further so they can be uploaded here I have attached them to imageshack - hope this is okay:

    http://img220.*************/img220/4...cf0432cont.jpg
    http://img694.*************/img694/7144/dscf0437r.jpg
    http://img21.*************/img21/1011/dscf0440y.jpg
    http://img217.*************/img217/6394/dscf0443rb.jpg
    http://img841.*************/img841/7311/dscf0432x.jpg

    Thank for your help.
  • Toasty
    Badcaps Legend
    • Jul 2007
    • 4171

    #2
    Re: Samsung Syncmaster 245b - Testing resistors

    Your test points, as marked, are wrong. You -will- read continuity on the like colored circles there as it is the circuit board foil.

    You want to measure across each of the the resistors, which should each read 68Ω.
    RB805, 806, 807

    These PSUs should also be recapped to avoid continuing problems. Search (advanced) the forums for 245BW >> Titles only >> Threads

    Several deal with this EXACT PSU board and the caps that should be used to re-cap them. Also do the caps on the backlight inverter.

    Remove (carefully) any of that dried caulk/gunk/glue from any components. You can replace it with any good brand of silicone caulk.

    Toast

    EDIT: attached image of (hopefully) correct resistor test points
    Attached Files
    Last edited by Toasty; 12-08-2011, 12:06 PM. Reason: Upload correct test point pic
    veritas odium parit

    Comment

    • Ruffles
      New Member
      • Dec 2011
      • 2

      #3
      Re: Samsung Syncmaster 245b - Testing resistors

      Hello Toasty. Thanks for taking the time to reply. I'll follow your advice and see what I can come up with and will let you know.

      Comment

      • trebo
        Badcaps Veteran
        • Feb 2010
        • 514
        • Wales, UK

        #4
        Re: Samsung Syncmaster 245b - Testing resistors

        hi toasty @ ruffles
        as you used the word (hopefully) it got my inquisitive head going
        looked at other pics on other threads on this and come up with this
        not 100% sure, what do you think on this

        edit: just noticed it also runs with resistor screen codes
        Attached Files
        Last edited by trebo; 12-09-2011, 07:12 AM.

        Comment

        • Toasty
          Badcaps Legend
          • Jul 2007
          • 4171

          #5
          Re: Samsung Syncmaster 245b - Testing resistors

          Electrically the same difference.
          veritas odium parit

          Comment

          • trebo
            Badcaps Veteran
            • Feb 2010
            • 514
            • Wales, UK

            #6
            Re: Samsung Syncmaster 245b - Testing resistors

            Originally posted by Toasty
            Electrically the same difference.
            Ah, got you, see what you mean

            Got too much time on hands

            Comment

            Related Topics

            Collapse

            • Document Archive
              Samsung Galaxy Book 2 Notebook Specification for Upgrade or Repair
              by Document Archive
              This specification for the Samsung Galaxy Book 2 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Galaxy Book 2 boardview and Galaxy Book 2 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
              09-07-2024, 05:50 AM
            • soopacrucial
              Samsung Syncmaster 740BF repair
              by soopacrucial
              Hi folks,

              I'm new here and was wondering whether you might be kind enough to give me some advice on troubleshooting the following problem:

              Quite a few years ago now, a couple of years from new, my Samsung Syncmaster 740BF LCD monitor starting playing up by making a buzzing noise and then the display would go blank. I seem to remember the blue power led would also go off when this happened but that I'm not 100% sure of. By pressing the power button I do remember I could at first get it working again but eventually the problem would come back. At the time I had read about...
              10-29-2024, 02:40 PM
            • Document Archive
              Samsung Galaxy Book Ion NP930XCJ Notebook Specification for Upgrade or Repair
              by Document Archive
              This specification for the Samsung Galaxy Book Ion NP930XCJ Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the NP930XCJ boardview and NP930XCJ schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
              09-06-2024, 11:40 PM
            • Document Archive
              Samsung Galaxy Book Ion NP950XCJ Notebook Specification for Upgrade or Repair
              by Document Archive
              This specification for the Samsung Galaxy Book Ion NP950XCJ Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the NP950XCJ boardview and NP950XCJ schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
              09-06-2024, 11:40 PM
            • Document Archive
              Samsung Galaxy Book Ion NP950XCJ Notebook Specification for Upgrade or Repair
              by Document Archive
              This specification for the Samsung Galaxy Book Ion NP950XCJ Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the NP950XCJ boardview and NP950XCJ schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
              09-06-2024, 08:40 PM
            • Loading...
            • No more items.
            Working...