ASUS VH222H - PowerSupply Problem

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  • dkp0h
    New Member
    • Jan 2011
    • 2
    #1

    ASUS VH222H - PowerSupply Problem

    Hello, i'm french and really noob on electronic but i'm very curious and interested to solve some (maybe) easy problem...

    So i hope i can learn more with your experience....

    My screen : ASUS VH222H
    One day a strong odor was noted in my room so i decided to open it to find out what it was...so take a look at the photos :

    PowerSupply CARD :



    From these first photos what about feasibility ?? :O )

    Do you think with such burn pcb, i can still try something ?

    Here it is the component involve :


    (You can notice some traces of burn)

    First of all, I hope you have enough elements to give me your opinion about my problem...if i can change this component and get back correctly on the pcb...

    Thank You...

    dkp0h
    (FRANCE)
    Tags: None
    • seanc
      Badcaps Legend
      • Nov 2008
      • 1319
      #2
      Re: ASUS VH222H - PowerSupply Problem

      Well looking at the set of connectors opposite side of the transformer, I can see no component.
      Are those pins opposite, covered in glue?
      I wonder if there was a bad solder joint which has gotten hot and melted the glue...
      As for why it got hot, that's another question. Perhaps the transformer has shorted.

        Comment

        • Th3_uN1Qu3
          Believe in
          • Jul 2010
          • 6031
          • Romania
          #3
          Re: ASUS VH222H - PowerSupply Problem

          Arcover in high voltage section. Could be bad (open) CCFL lamp and failed overvoltage protection, could be just that some metallic debris landed inside... Scrape the burnt material off and try to power the monitor again. See what that gives. It's important that you get the affected area very clean otherwise it'll arc again (burnt stuff = carbon, carbon is conductive). If the burn is deep use a dremel tool to cut that part of the board out, just don't damage the traces. There's plenty of space there so if you are careful it should be easy. Remove the transformer before attempting such a job though.

          Also i see that the board has Elite capacitors. Better replace them even though they are not bad yet, they will go bad soon.
          Originally posted by PeteS in CA
          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
          A working TV? How boring!

            Comment

            • goodpsusearch
              Badcaps Legend
              • Oct 2009
              • 2850
              • Greece
              #4
              Re: ASUS VH222H - PowerSupply Problem

              I thought that Elite were good caps but not low esr....

                Comment

                • TheLaw
                  Badcaps Veteran
                  • Jan 2011
                  • 477
                  #5
                  Re: ASUS VH222H - PowerSupply Problem

                  Originally posted by goodpsusearch
                  I thought that Elite were good caps but not low esr....
                  Nah. They are pretty terrible.

                    Comment

                    • Behemot
                      Badcaps Legend
                      • Dec 2009
                      • 4845
                      • CZ
                      #6
                      Re: ASUS VH222H - PowerSupply Problem

                      Didn't you mean Elna? Those are good but not low ESR IIRC.
                      Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

                      Exclusive caps, meters and more!
                      Hardware Insights - power supply reviews and more!

                        Comment

                        • goodpsusearch
                          Badcaps Legend
                          • Oct 2009
                          • 2850
                          • Greece
                          #7
                          Re: ASUS VH222H - PowerSupply Problem

                          Yes... sorry I mixed them up...

                            Comment

                            • dkp0h
                              New Member
                              • Jan 2011
                              • 2
                              #8
                              Re: ASUS VH222H - PowerSupply Problem

                              Thank you guys, happy to see that it's possible to fix....

                              Thx 'Th3_uN1Qu3', i'll do with your method, clean it, replace transformer and try it...

                              If i need to change this transformer, which component could replace it ?

                              d!K

                                Comment

                                • Th3_uN1Qu3
                                  Believe in
                                  • Jul 2010
                                  • 6031
                                  • Romania
                                  #9
                                  Re: ASUS VH222H - PowerSupply Problem

                                  Look it up at www.lcdparts.net, they should have it.
                                  Originally posted by PeteS in CA
                                  Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                                  A working TV? How boring!

                                    Comment

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