What devices usually suffer from bad/blown caps?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • tomioo9
    New Member
    • Feb 2013
    • 2
    • Sweden

    #1

    What devices usually suffer from bad/blown caps?

    Hey guys!
    As the title says, im looking for different devices that commonly suffer from bad/blown caps that are easy to repair.

    Hope u guys can help me!

    Thanks!
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: What devices usually suffer from bad/blown caps?

    Forgive me if it seems rude but that is one of the the worst questions I have ever seen on this forum. I actually thought it was spam.
    Scroll down the page to Forum Jump and click on any heading between Site suggestions and classified/buy/sell and you will discover a whole world of items with bad caps.

    Easy to repair????

    That is entirely down to you, your knowledge, your tools,your budget, the time you have and the availability of any spares or equivalent parts.
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • tomioo9
      New Member
      • Feb 2013
      • 2
      • Sweden

      #3
      Re: What devices usually suffer from bad/blown caps?

      Originally posted by selldoor
      Forgive me if it seems rude but that is one of the the worst questions I have ever seen on this forum. I actually thought it was spam.
      Scroll down the page to Forum Jump and click on any heading between Site suggestions and classified/buy/sell and you will discover a whole world of items with bad caps.

      Easy to repair????

      That is entirely down to you, your knowledge, your tools,your budget, the time you have and the availability of any spares or equivalent parts.
      Skip the "easy to repair" part, i'm looking for most common problem devices use to get that only involves replacing caps. I know for instance that LCD tv's can get repaired just by replacing caps.

      Comment

      • multimeter
        Badcaps Veteran
        • Jan 2011
        • 739
        • united kingdom

        #4
        Re: What devices usually suffer from bad/blown caps?

        Originally posted by tomioo9
        Skip the "easy to repair" part, i'm looking for most common problem devices use to get that only involves replacing caps. I know for instance that LCD tv's can get repaired just by replacing caps.
        anything that has pcb's can suffer with failed caps,from a washing machine,to a dvd player to a household heating boiler,replacing caps wont always fix the problem if you dont have the knowledge,there are a vast amount of parameters that need to be satisfied even with replacing lytics
        fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

        ----------------------------------------------
        please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: What devices usually suffer from bad/blown caps?

          Originally posted by tomioo9
          Skip the "easy to repair" part, i'm looking for most common problem devices use to get that only involves replacing caps. I know for instance that LCD tv's can get repaired just by replacing caps.
          I have only seen about 7 out of 50 repairs that involve bad caps. Most repairs involve considerable troubleshooting.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • Gariarto
            Senior Member
            • Jul 2012
            • 151
            • USA

            #6
            Re: What devices usually suffer from bad/blown caps?

            tomioo9 if you're looking to make money by taking in as you say "common, easy to repair devices" then like Tom66 said, its not going to be what you are hoping for. Youtube is chest deep in quick fixes that had little to do with proper diagnostics or even using the correct rated parts. Hopefully thats not your inspiration ? If I'm mistaken then I stand corrected but there's an accumulation of help in here thats supplied from a massive time investment in education and long hard earned learning curves. Many of the members make it look easy because they are career men.

            So to help you better it begs the question.. "Why do you ask ?"

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: What devices usually suffer from bad/blown caps?

              If it were so easy everyone would do it. Though really all you need is a basic technical understanding, patience, and ability/willingness to learn.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • retiredcaps
                Badcaps Legend
                • Apr 2010
                • 9271

                #8
                Re: What devices usually suffer from bad/blown caps?

                Randtek in this post says "The percentage of sets I see that have capacitors bad is less than 4%."

                https://www.badcaps.net/forum/showthread.php?t=25984
                --- 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

                • PeteS in CA
                  Badcaps Legend
                  • Aug 2005
                  • 3579
                  • USA, Unsure of Planet

                  #9
                  Re: What devices usually suffer from bad/blown caps?

                  Electrolytic capacitors have been among many significant causes of failures in electronics pretty much since being invented. Though they constitute 0% of failures in the electronic products I work on ... the products don't have any electrolytics. I used to have a bunch of TV repair magazines from the mid-late 50s, and lytics were frequently mentioned as problem causes back then (and were a PITA, because so many were multi-section semi-custom parts made for specific TV manufacturers, a parts stock nightmare for TV repair people).

                  Power supplies and the VRMs on computer motherboards are particularly stressful applications for electrolytic capacitors. DC motor controllers are as well (peak ripple currents 5X-10X the parts' maximum rated ripple current, for several seconds or even several minutes at a time).
                  PeteS in CA

                  Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
                  ****************************
                  To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
                  ****************************

                  Comment

                  • RethoricalCheese
                    Badcaps Legend
                    • Mar 2013
                    • 1517
                    • Estonia

                    #10
                    Re: What devices usually suffer from bad/blown caps?

                    LCD monitors, PSU-s, desktop motherboards.

                    Replacing caps on motherboards might be a little harder than replacing in PSU-s but it depends on your skill and equipment.

                    The problem is that there is always a high risk that caps are not the only problem.

                    Comment

                    Related Topics

                    Collapse

                    • odtech
                      Asus UX490U laptop blown (caps?) on power board.
                      by odtech
                      Greetings friends.

                      I was given this nice little laptop and would like to revive it if possible but i'm stuck identifying blown components. I'm very new to the repair game so i'm proceeding very cautiously.

                      I don't know the history of this laptop and the donator didn't elaborate what happened but it seems some moisture got into the USB C charge port and the result was what looks like some blown caps. The tell is some gunk inside the USB C port and corrosion on the outside as well as what looks like corrosion around the blown components.

                      Any guidance...
                      08-06-2023, 10:29 AM
                    • zlr8r
                      HP Probook 640 G5 - replaced blown components, getting power led, fan full, 5-flashes on CAPS Lock and NUM lock, black screen
                      by zlr8r
                      Hey guys, bit stumped with this laptop after replacing 2 blown components i.e., MP86493, MP2979A.

                      To begin with, this laptop was dead-dead.

                      Now with replaced (visibly) blown components, i do get some progress; after connecting battery or main cable;
                      • am getting white power led
                      • 5-long-flashes on CAPS Lock and NUM lock
                      • then, fan full speed
                      • CPU heats up some (smaller die PCH, does not)
                      • always constant black screen no matter what's tried
                      • no USB recognition
                      • no HDMI output
                      this is as far as I can get with it and not sure where to inspect next ?

                      I tried...
                      03-27-2024, 03:13 PM
                    • eryjus
                      Heathkit IO-4205 Power Supply Caps
                      by eryjus
                      Hello,

                      First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.

                      I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.

                      I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
                      ...
                      05-10-2023, 11:21 AM
                    • whc14765
                      1070 - Blown SMD caps, short on 12V PCI
                      by whc14765
                      Hey
                      I got a short on 3 pins of the PCI-E gold connector for 12V.
                      I see a few caps near the top right (near main power connector) that look blown, one is showing a short across it to GND.

                      Unforunately I don't have a schematic or board view for it (EVGA GTX 1070 FTW 8GB).



                      Due to the large number of caps there, I think it may just be decoupling.

                      Any ideas on figuring out the cap values? There also isn't any reference numbers for the caps on the silkscreen.
                      11-23-2022, 06:42 PM
                    • captain150
                      Help with switching power supply caps
                      by captain150
                      I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
                      I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,...
                      03-16-2025, 07:34 PM
                    • Loading...
                    • No more items.
                    Working...