Capacitor Question

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • 1supertech
    Badcaps Veteran
    • Apr 2012
    • 384
    • USA
    #1

    Capacitor Question

    I buy non working monitors to repair and sell them. I have noticed that a seven year old monitor that have low ESR value on Capxcon, Suscon, Lelon and most of the caps that are listed on Badcap .com.

    Should I trust those capacitors that look and test fine or should I just replace all caps? I have been doing this for about a year and so far I have a good track record with no monitor returns.

    Thanks
    Tags: None
    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Capacitor Question

      Originally posted by 1supertech
      I have been doing this for about a year and so far I have a good track record with no monitor returns.
      Since you live in the USA, you have access to high quality capacitors from reputable distributors for relatively little cost (especially if you buy in quantities of 10 or 50).

      With that in mind, I saw this quote recently ...

      “It takes many good deeds to build a good reputation, and only one bad one to lose it.”

      ― Benjamin Franklin
      --- 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

        • 1supertech
          Badcaps Veteran
          • Apr 2012
          • 384
          • USA
          #3
          Re: Capacitor Question

          Thanks retiredcaps I will change them all

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271
              #4
              Re: Capacitor Question

              And to drive home the point, see this recent complaint

              https://www.badcaps.net/forum/showthread.php?t=28449
              --- 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

                • 1supertech
                  Badcaps Veteran
                  • Apr 2012
                  • 384
                  • USA
                  #5
                  Re: Capacitor Question

                  I guess I have been lucky on no returned monitors just changing bad capcitors using
                  Panasonic caps fm,fr,fc. Looks like I better change them all good or bad
                  Thanks retirecaps

                    Comment

                    • retiredcaps
                      Badcaps Legend
                      • Apr 2010
                      • 9271
                      #6
                      Re: Capacitor Question

                      I save the non bloated bad quality name caps for uncertain projects or as "test" caps.
                      --- 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

                        • 1supertech
                          Badcaps Veteran
                          • Apr 2012
                          • 384
                          • USA
                          #7
                          Re: Capacitor Question

                          Good Idea

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • MORETTIGIAN
                              Capacitor detached from PCB – RTX 2070 Super Founders Edition
                              by MORETTIGIAN
                              Title:
                              Capacitor detached from PCB – RTX 2070 Super Founders Edition

                              Description:
                              During maintenance on an RTX 2070 SUPER Founders Edition, I found a capacitor lying on my desk after reassembly.
                              I did not notice it detaching, so I am unsure of its original location on the PCB.

                              Procedure performed:
                              - Removed backplate
                              - Cleaned heatsink and PCB with isopropyl alcohol + soft ESD brush
                              - Reapplied thermal compound
                              - Reassembled card

                              Observed behavior after reassembly:
                              - GPU powers on and operates normally under...
                              RTX 2070 SUPER
                              11 Photos
                              09-18-2025, 12:14 PM
                            • keepread
                              Dell monitor PSU vs Dell laptop PSU
                              by keepread
                              Hi there!
                              Someone gave me their old monitor, it's Dell S2715ht.
                              The owner was using it when his PSU began to smell and then to smoke. It literally began to melt. He turned the monitor off, pulled the PSU, and ditched it because it was smelly even after it cooled. So I got the monitor but not the plug.
                              Now, I tried to bring the monitor back to life, by plugging one of my many Dell laptop PSUs. They are of the same 19.5V, and the wattage of the laptop PSU is higher than that which the monitor is rated for. Visually, the socket on the monitor seems compatible, and the plug plugs...
                              10-30-2025, 04:45 PM
                            • tony359
                              Bipolar capacitor for vintage Apple CRT monitor
                              by tony359
                              Good day all,

                              I have a question about some old monochrome Apple monitors.

                              Inside those monitors there is one bipolar capacitor. From the schematics I have it's part of the horizontal linearity circuit.

                              A friend replaced a bipolar 4.7uF 25V capacitor with a Nichicon bipolar 4.7uF 25V. The cap popped after about one hour. The new capacitor was much smaller than the original one but that's not a surprise as the original one was from 1980. (I am not sure whether the original was was actually 4uF and was replaced with a 4.7uF?)

                              The new capacitor:...
                              08-12-2024, 03:27 AM
                            • wattage
                              AOC AG493UCX 49-inch monitor - Firmware request
                              by wattage
                              Hello Badcaps Community,

                              I purchased a preowned AOC monitor that is not working and out of warranty. It was sold as not working. I am looking for guidance on self-repair. In particular, I am after the firmware for the monitor. At the end, I have included monitor model information and links to pics and vids of the issue.

                              The problem is that it will not display a picture on any of its inputs. And the on-screen menu does not appear. The power button works properly. It powers on with the remote as well. But the on-screen menu does not appear, even when not connected to any...
                              07-13-2025, 04:41 PM
                            • ant3202
                              HP 27es - LED monitor - Monitor Flashing On - Off
                              by ant3202
                              Hi Everyone

                              Lately I am experiencing the deja-vu incident on one of the led monitor like this.
                              https://www.badcaps.net/forum/troubl...lashing-on-off

                              The monitor is HP 27es LED Monitor
                              https://h30434.www3.hp.com/t5/Deskto...e/td-p/6804692

                              The monitor will randomly blackout and display no signal and will recover again.
                              Sometimes need to power and off again to restore the display but...
                              03-20-2025, 07:30 PM
                            • Loading...
                            • No more items.
                            Working...