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Yet Another Hanns-G HG281D Thread...

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    #21
    Re: Yet Another Hanns-G HG281D Thread...

    @lumberjack, those two cap on the main board by the regulator, when they are bad, the screen will have noise, or black out, but if you lower the resolution to really low, the pictures will be on OK. Very common failure symptom when those two caps are bad.
    Thanks for the feedback.

    @reddeth, I would recommend PANASONIC FM or FR (Low ESR type, 105c rating) series from Digikey, I use them in all my repair, just match the capacitance/voltage (higher voltage is OK) and the dimension that will fit your board.
    Attached Files
    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

      #22
      Re: Yet Another Hanns-G HG281D Thread...

      Thanks, I will be ordering them in the next few days then. It's been hard to get back on this site, not only was I not emailed after receiving a response, but when i tried to come back to look for a response I kept getting under construction messages...that's frustrating :-/
      Appreciate the advice!

      EDIT- I was just looking at digikey and couldnt find any panasonic fm or fr at 100uf while at 16v but I saw someone earlier mention that they used 100uf at 50v and it worked great? I then saw your pdf sheet on your post (budM) and saw that they do have 100uf in 50v and you noted that higher voltage is okay...so would that be the way to go? 100uf at 50v at 105c?
      Last edited by PhrygianKat; 12-30-2012, 06:49 PM.

      Comment

        #23
        Re: Yet Another Hanns-G HG281D Thread...

        any chance these would work? have this old ati 9800pro 256mb laying around collecting dust. Maybe these would get me by for now?

        Comment

          #24
          Re: Yet Another Hanns-G HG281D Thread...

          Yes, you can give them a try. Just remember that the ones in your photo are surface mount and the ones you are replacing are inserted into holes drilled through the board. You'll understand when you remove them.

          FYI- you can also use Panasonic FR caps and digikey has them in stock:

          http://www.digikey.com/product-detai...391-ND/2433525

          Comment

            #25
            Re: Yet Another Hanns-G HG281D Thread...

            Originally posted by jetadm123 View Post
            Yes, you can give them a try. Just remember that the ones in your photo are surface mount and the ones you are replacing are inserted into holes drilled through the board. You'll understand when you remove them.

            FYI- you can also use Panasonic FR caps and digikey has them in stock:

            http://www.digikey.com/product-detai...391-ND/2433525
            good point, I think I'll forgo the headache and grab those 50v panasonics! Thanks!

            Comment

              #26
              Re: Yet Another Hanns-G HG281D Thread...

              thanks, guys...those two 100/16 seem to have been the cause of all my problems. Swap them out for the panasonic 100/50v and everything is working great. Seems that the image looks much brighter and clearer too. Definately wasn't my finest hour though, I had a hell of a time removing the old caps and clearing out the holes so I ultimately went with soldering leads and extending the new caps an inch. Seems to be working great.
              Thanks again!

              Comment

                #27
                Re: Yet Another Hanns-G HG281D Thread...

                Thanks for the repair feedback, glad to see you got it working. You should also look into replacing the caps on the power supply board, they will fail sooner or later also.
                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

                  #28
                  Re: Yet Another Hanns-G HG281D Thread...

                  Good work. The only thing I would suggest to others seeing this thread is that the cap leads should as short as possible, since they can act like an antenna and pick up interference, which can cause picture distortion. Not good on a board that does the signal processing. In your case, there were no issues.

                  Comment

                    #29
                    Re: Yet Another Hanns-G HG281D Thread...

                    Originally posted by budm View Post
                    Thanks for the repair feedback, glad to see you got it working. You should also look into replacing the caps on the power supply board, they will fail sooner or later also.
                    Will do, really only needs to last me another 4 months but It looks so much better then my new LED and I got so used to the 16:10 aspect that I may just pimp this baby out. Gaming on pc at 1920x1200 seems way less clausterphobic then 1080p. The extra vertical realestate makes a huge difference on my eyes :-P

                    Comment

                      #30
                      Re: Yet Another Hanns-G HG281D Thread...

                      Originally posted by budm View Post
                      You should also look into replacing the caps on the power supply board, they will fail sooner or later also.
                      Here is where I usually pop in and say for future readers, again, this monitor and its variations all run temperature hot. Even though the power board has quality United Chemi-con caps, they will dry out fairly fast due to the heat.
                      --- begin sig file ---

                      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                      Please do not post inline and offsite as they slow down the loading of pages.

                      --- end sig file ---

                      Comment

                        #31
                        Re: Yet Another Hanns-G HG281D Thread...

                        Originally posted by budm View Post
                        These two caps:
                        http://s807.photobucket.com/albums/y...t=DSC00085.jpg

                        It depends how bad the caps are, if they dry out so much, then heat may not help at all.
                        Caps in the power supply for this monitor (same as used on some of the Viewsonics Monitors) will need to be replaced also. I suggest these two caps first since they are easy to do.
                        I googled and found this old thread. Thanks for the info. None of my caps were bulging, but replacing those two fixed my problem. Now the monitor works again.

                        Comment

                          #32
                          Re: Yet Another Hanns-G HG281D Thread...

                          Yes, this monitor is a perfect example of caps that go bad, but never bulge.
                          On both the power board, and the main board, in this model.
                          The only way you can really know is to have an ESR meter.

                          Thanks for the feedback

                          Comment

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