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ViewSonic VP201B problem

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    #21
    Re: ViewSonic VP201B problem

    Originally posted by HurricaneTech View Post
    What else should I be checking?
    If the LCD is hooked up to a computer, can you see the display if you shine a flashlight onto the LCD?

    It looks like there are 2 fuses on the inverter board. Check to see if they are open or not. A good fuse should measure less than 1.0 ohms on your multimeter.
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    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.

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      #22
      Re: ViewSonic VP201B problem

      Originally posted by retiredcaps View Post
      If the LCD is hooked up to a computer, can you see the display if you shine a flashlight onto the LCD?
      I tried the flashlight trick and no joy.

      Originally posted by retiredcaps View Post
      It looks like there are 2 fuses on the inverter board. Check to see if they are open or not. A good fuse should measure less than 1.0 ohms on your multimeter.
      It has a single fuse on the inverter board, looks like a resistor, green in color, F1 right above C49 to the left of the connector, reads .1 ohms. Same for F251 on the main board.

      Comment

        #23
        Re: ViewSonic VP201B problem

        Originally posted by HurricaneTech View Post
        I tried the flashlight trick and no joy.
        1) Okay, let's start with posting pictures of your boards so we can see if there are any obvious defects.

        2) Post clear focused pictures AFTER reading

        https://www.badcaps.net/forum/showthread.php?t=1868

        3) Please do not post pictures inline as they slow down the loading of pages.

        4) For best picture quality and clarity take your boards to a window on a sunny day, turn flash off, and use macro mode. Take a top down view of all your boards (front and back). Make sure the photo is legible so that we can read the PCB printing clearly. A shutter speed of 1/125 or faster will produce nice clear focused pictures. Try to get a photo that is 2000x2000 resolution or as close as possible.

        5) Here is an example of the pictures we want.

        https://www.badcaps.net/forum/showpo...94&postcount=1

        6) If you have a multimeter, check the connector between the power and logic board to see if the secondary voltages like 5V DC are present. You might also see 12V or 19V DC depending on the monitor.
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        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.

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          #24
          Re: ViewSonic VP201B problem

          I can't even get the case open to get to the electronics. I found 4 screws (on corners) so what next? I need a guiding hand.
          I feel like a total idiot!!!!

          Comment

            #25
            Re: ViewSonic VP201B problem

            Originally posted by eswallie View Post
            I can't even get the case open to get to the electronics. I found 4 screws (on corners) so what next? I need a guiding hand.
            I feel like a total idiot!!!!
            One of the "rules" here is not to cross post because it confuses people and makes for duplicate work and effort. I already answered your question in your original thread.
            --- 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 ---

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