iiyama 24" E2407HDSV [DEAD]

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • ivanoxx
    New Member
    • Sep 2018
    • 8
    • Slovakia

    #1

    iiyama 24" E2407HDSV [DEAD]

    Hi lads, I've been trying for several months (mostly waiting for parts) to repair my monitor. Before its definitive death, monitor was shutting off and on repetitively and then it just died. Led is not lit, completely dead. Now i have replaced all caps, fuse, and mosfet. I tried to replace IC LD7576PS which didnt help me. ( https://cdn.badcaps-static.com/pdfs/...ce119f6336.pdf ) here are schematics, different monitor, same psu.

    What else could it be? What component is "triggering" something so it could start up.
    Last edited by ivanoxx; 09-18-2018, 05:38 AM.
  • ivanoxx
    New Member
    • Sep 2018
    • 8
    • Slovakia

    #2
    Re: iiyama 24" E2407HDSV [DEAD]

    https://imgur.com/a/yU9um5v

    this is the board


    IC LD7576PS has in datasheet:

    On/Off Control
    By pulling COMP pin lower than 1.2V will disable the gate
    output pin of LD7576X series immediately. The off mode
    can be released when the pull-low signal is removed.

    what does this mean?

    then this : Over Load Protection (OLP) - Latch mode

    "... As soon as the
    over load condition is removed, the controller will be kept
    latched until the Vcc drops lower than 8V. It is necessary
    to start another AC power-on recycling to get the output
    back. "
    Last edited by ivanoxx; 09-18-2018, 05:43 AM.

    Comment

    • ivanoxx
      New Member
      • Sep 2018
      • 8
      • Slovakia

      #3
      Re: iiyama 24" E2407HDSV [DEAD]

      Could Faulty OZ9937GN lead to monitor not turning ON? Even if its IC for CFL. what component of the monitor is Turning monitor ON if PSU has every voltage right - potentionaly.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: iiyama 24" E2407HDSV [DEAD]

        Just to be clear:
        1) Do you have ANY DC Voltages on that white connector of the power supply board that goes to the main/logic board?
        2) Power supply board is an always on power supply, it is always running, the main logic board will send out the BL-ON control signal to turn on the backlights circuits.
        3) It that the pictures of YOUR board and not from the WEB? The caps looks original and I do not see any soldering works on the board.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • ivanoxx
          New Member
          • Sep 2018
          • 8
          • Slovakia

          #5
          Re: iiyama 24" E2407HDSV [DEAD]

          I have 0.035V going in white connector, and yes those pictures are from web unfortunately, But I tried my best to shoot mine. https://imgur.com/a/EJcrJuV

          Comment

          Related Topics

          Collapse

          • momaka
            HannStar Hanns-G HC194d LCD monitor repair
            by momaka
            Normally, I never post repairs this quick after I do them, because… I am usually very slow. But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
            03-15-2023, 10:17 PM
          • mikey5791
            Need help replacing led strip on Iiyama Prolite XUB2390HS monitor
            by mikey5791
            Hi,
            Got this working ips led monitor by the brand of
            Iiyama Prolite XUB2390HS presumably a 23 inch type given to me with suspected bad led backlight. To test it, i unplugged the bad flat ribbon type connector and plugged it a good flat ribbon led connector scrapped from a HP Pavillion 27cw (led strip with 60 led). Good news is the HP led strip lights up but not fully, in between there are about 15 unlit leds.(as picture attached shows).

            Fyi, i had not opened and removed the old bad led strip. My question is whether is it possible to cut some of the extra leds(say...
            09-04-2023, 03:50 AM
          • wattage
            AOC AG493UCX 49-inch monitor - Firmware request
            by wattage
            Hello Badcaps Community,

            I purchased a preowned AOC monitor that is not working and out of warranty. It was sold as not working. I am looking for guidance on self-repair. In particular, I am after the firmware for the monitor. At the end, I have included monitor model information and links to pics and vids of the issue.

            The problem is that it will not display a picture on any of its inputs. And the on-screen menu does not appear. The power button works properly. It powers on with the remote as well. But the on-screen menu does not appear, even when not connected to any...
            07-13-2025, 04:41 PM
          • ant3202
            HP 27es - LED monitor - Monitor Flashing On - Off
            by ant3202
            Hi Everyone

            Lately I am experiencing the deja-vu incident on one of the led monitor like this.
            https://www.badcaps.net/forum/troubl...lashing-on-off

            The monitor is HP 27es LED Monitor
            https://h30434.www3.hp.com/t5/Deskto...e/td-p/6804692

            The monitor will randomly blackout and display no signal and will recover again.
            Sometimes need to power and off again to restore the display but...
            03-20-2025, 07:30 PM
          • Rick_1234
            LG 23MP55HQ LED Monitor turns off after a few seconds or flickers.
            by Rick_1234
            Good evening, gentlemen.

            I have a problem with my monitor. It turns off after a few seconds or flickers. Shining a flashlight on the screen doesn't show any image, so I guess it's not the "2 seconds to dark" I read in the forum.

            To turn it back on, I have to press the power button twice. Then after a few seconds it turns off again or flickers. See video.
            https://drive.google.com/file/d/1L6S...ew?usp=sharing


            Things I tried

            - Bought a new AC adapter thinking that was the problem but the problem...
            06-22-2024, 04:44 PM
          • Loading...
          • No more items.
          Working...