LG 1942TQ -stinks

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  • smason
    Badcaps Legend
    • Feb 2010
    • 1652
    • Canada
    #1

    LG 1942TQ -stinks

    Here's a weird one.
    LG 1942TQ from work. Was functioning fine, user complained that it smelled bad.
    Help desk guy agreed, and replaced it. 'course I snagged it

    Took it apart expecting an arcing lamp, melting connector, oozing cap or something obvious.
    Nothing really. Power supply pcb has some heat marks, nothing fails the sniff test (powered off) and the Samyoung and Samwha caps all have flat tops.

    Wait a sec. What's that?
    The big mains cap is bulged! Never seen that before.
    Measured (in circuit) the ESR micro says "what cap? I don't see a cap"
    My Fluke 87 says, .4uf or so. Will pull it and measure it later.
    Attached Files
    36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....
    Tags: None
    • smason
      Badcaps Legend
      • Feb 2010
      • 1652
      • Canada
      #2
      Re: LG 1942TQ -stinks

      Originally posted by smason
      The big mains cap is bulged! Never seen that before.
      Measured (in circuit) the ESR micro says "what cap? I don't see a cap"
      My Fluke 87 says, .4uf or so. Will pull it and measure it later.
      Pulled it and it's definitely toast. I just did a cap order, so will wait until I have more stuff to order, or perhaps I'll steal one from one of my spare boards.
      'course on all of my spare boards you can't read the cap values on the large cap, and they're glued down.
      36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

        Comment

        • sabre504
          Badcaps Veteran
          • May 2010
          • 449
          • United Kingdom
          #3
          Re: LG 1942TQ -stinks

          Have had a spate of these lately ,
          some swollen and some with corroded legs and a few suffering from both .
          Mainly in 22" Technika's and Cello's.

          But as a rule you don't see it often

            Comment

            • smason
              Badcaps Legend
              • Feb 2010
              • 1652
              • Canada
              #4
              Re: LG 1942TQ -stinks

              Originally posted by sabre504
              some with corroded legs
              Yeah. one of the legs fell off when I was removing it.
              36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

                Comment

                • trodas
                  Badcaps Veteran
                  • Jan 2006
                  • 770
                  • Czech republic
                  #5
                  Re: LG 1942TQ -stinks

                  Samwha caps - known crap. Be lucky it did not catch fire yet. Replacement is easy to get on Digi-key, tough
                  "It is dangerous to be right in matters on which the established authorities are wrong." - Voltaire
                  "I believe that all the people who stand to profit by a war and who help provoke it should be shot on the first day it starts..." - Hemingway my config - my caps

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