Shorted resistor replacement

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Welchs101
    Badcaps Veteran
    • Sep 2008
    • 979
    • USA

    #1

    Shorted resistor replacement

    Hi,

    Problem: I am trying to repair an LCD monitor and i came across a "shorted" resistor (see enclosed photo). I am trying to find a replacement resistor but i am having problems. From the color code (red, black, white, gold) the value of the resistor is 20000MegOhm........but this does not seem right. Seems to high.

    Am i reading it wrong?

    Could have resistor gotten "burned" and changed the colors?

    With a resistor that high why even have one in the circuit. YOu cant find a resistor with that high a value on digikey.

    Can anyone help?
    Attached Files
  • Toasty
    Badcaps Legend
    • Jul 2007
    • 4171

    #2
    Re: Shorted resistor replacement

    Shorted resistor? No. Resistors go up in value.

    I'm guessing your reading 0.2Ω and thinking shorted. It's likely a 0.2Ω resistor and the silver band looks white. Red(2) - Black(0) - Silver(x.01) - Gold(5%)

    That also looks to be a carbon resistor, which is a no-no in modern electronics. Fire hazard. If that were truly burned-up, it would show it.

    Toast
    veritas odium parit

    Comment

    • Welchs101
      Badcaps Veteran
      • Sep 2008
      • 979
      • USA

      #3
      Re: Shorted resistor replacement

      Your correct. The resistor does measure 0.2ohm.

      But from the picture the "white" band sure does look white.......doesnt it?

      Thanks. What you have said makes sense. Guess i keep looking for something else to be the problem.

      Comment

      • Harvey
        Badcaps Veteran
        • Apr 2007
        • 264

        #4
        Re: Shorted resistor replacement

        Could be a choke, the colour codes seems the wrong way for a resistor..

        Comment

        • Agent24
          I see dead caps
          • Oct 2007
          • 4950
          • New Zealand

          #5
          Re: Shorted resistor replacement

          That looks like a really old style resistor, especially for an LCD.

          Is the board marked with anything underneath to suggest if it's a resistor or choke?
          "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
          -David VanHorn

          Comment

          Related Topics

          Collapse

          • harp
            high voltage high resistance marking resistor
            by harp
            Is there any reason why high voltage high resistance resistor use weird marking and value on it? Standard nomenclature, EIA value not used?...
            08-26-2024, 01:42 PM
          • Tomylee
            No LCD image after connector replacement – lifted components and damaged resistor (Nintendo Switch Lite HDH-CPU-02)
            by Tomylee
            Hi everyone,

            Sorry for the person who’s going to read all this !
            I'm on a Nintendo Switch Lite, motherboard HDH-CPU-02.

            While replacing the left joystick, I had to remove the motherboard to access the connector underneath. When I lifted the LCD connector latch, it broke (the plastic had become brittle over time), so I replaced the entire connector.

            During the desoldering of the LCD connector using hot air, three small components located just below the connector (likely 0402 capacitors) came off and remained stuck to the bottom of the...
            07-11-2025, 11:52 AM
          • jinu_j
            Dell 2209WA - power supply - Fusible Resistor replacement
            by jinu_j
            Hi

            I am trying to repair an ancient Dell 2209WA Monitor which suddenly shut off with a pop sound. On investigation found that one of the fusible resistors had blown. Further investigation identified multiple components as faulty because of which the fusible resistor blew. Please refer the attached circuit diagram showing the components that were found to be damaged.

            1. FR950 - blown fusible resistor - 0.2 Ohm 1W
            2. Q950 - shorted Q950 MOSFET - 650V 10A N Channel Mosfet
            3. R835 - Blown Resistor - 20KOhm SMD resistor
            4. D930 - Shorted Schottkey Diode...
            05-03-2025, 10:51 PM
          • OOF DIO
            ASUS FX505DV no power shorted at PWM controller Pin 3 VREG3 TPS51225C, need pinpointing of the short.
            by OOF DIO
            (If anyone has a functional boardview file of FX505DV/DU that would be helpful)
            (Had 3 problems, now just 1)

            I have no experience or knowledge and usage of tools to repair devices besides the entire past 12-10 days of researching, watching YouTube repair videos and troubleshooting this laptop motherboard. ChatGPT was used as a guide to ask questions.
            I used boardviews of mostly FX505GD-M, and some FX505DU, FX505DD. Used schematics of FX505DU.

            I had originally intended to replace the BQ24780s first (due to previous battery removal while benchmarking) but I...
            04-19-2025, 05:03 PM
          • socketa
            A Shorted wirewound resistor?
            by socketa
            This resistor is from an ATX APFC PSU that connects bridge rectifier negative to primary capacitor negative
            I think that it's a current sensing resistor for the APFC
            Is it correct that it's color code indicates that it should be 0.47 ohms?
            I measured it to be around 0.08 oms
            The PSU blew up (visible arc flash) after problems with a powerstrip, but i got it working now after replacing the 10A fuse, rectifier, etc and removing/shorting the APFC diode locations and using a jumper in place of this PFC current sensing resistor
            I don't think that APFC likes being connected...
            05-15-2022, 04:50 PM
          • Loading...
          • No more items.
          Working...