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Badcaps Capacitor & Electronics Repair Forum
Frequently Asked Questions (No Posting)
All new members, PLEASE READ HERE FIRST! Posting only allowed by established members.
Topics: 45 Posts: 732
45 732
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 234 Posts: 41,067
234 41,067
Document & Software Archive
Common Parts Library - Datasheets
Share or download datasheets or application notes for electronic components and other parts. Contribute your knowledge or ask questions. Before using please read our Terms of Service.
Topics: 1 Posts: 3
Last Post: ncp81208 datasheet
1 3
xaruqui
by xaruqui
General Topics
General Capacitor Questions & Issues
Questions and answers for identifying whether your device has bad capacitors. Also post general capacitor-related questions and issues here.
Topics: 3,167 Posts: 32,579
3,167 32,579
General Computer & Tech Discussion
Have just a general computer question, post it here. This can be anything from an OS issue, hardware issue not related to capacitors, upgrade question, or whatever basic tech-related issue is on your mind.... This is also a good place to share your tech projects!
Topics: 4,492 Posts: 74,741
4,492 74,741
Troubleshooting Hardware & Devices and Electronics Theory
General Electronics Technical Discussion
If you have a general question concerning basic electronics theory or component function & usage, here's where it goes.
Topics: 3,949 Posts: 44,148
3,949 44,148
Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Technical discussions covering any type of desktop motherboard, video/graphics card, controller card, or whatever other desktop peripheral you need help with. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 6,701 Posts: 36,765
6,701 36,765
Sub-Forums:
Troubleshooting & Designing Networks
Post your computer network questions, ideas, gripes, and so on in here. This can be any type of network, whether its cabled, wireless, or whatever. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 499 Posts: 5,433
499 5,433
Troubleshooting Laptops, Tablets, and Mobile Devices
Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 31,431 Posts: 298,344
31,431 298,344
Sub-Forums:
BIOS Requests ONLY! (12,526/149,548)
Schematic Requests ONLY! (4,666/28,037)
Troubleshooting Computer Displays
Technical discussions covering any type of PC/computer display, whether it be CRT, LCD, or anything else. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 5,310 Posts: 75,635
Last Post: ASUS VP228
5,310 75,635
lotas
by lotas
Troubleshooting TVs and Video Sources
Technical questions about your defective television, projection screen, LCD/plasma, or any other type of video device. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 27,376 Posts: 373,531
27,376 373,531
Troubleshooting Power Supplies and Power Supply Design
Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 4,159 Posts: 65,058
4,159 65,058
Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices
Technical questions about your defective laser or ink printer, plotter, copier, scanner, and other imaging & printing devices. This section also includes digital cameras. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 299 Posts: 1,654
299 1,654
tuan nguyen
Troubleshooting Audio Equipment
Technical discussion on audio equipment troubleshooting and installation. This can be anything from a home/car stereo, guitar amp, and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 2,306 Posts: 27,328
2,306 27,328
Troubleshooting Appliances and other Household Electronic Stuff
Technical discussion on household appliances & other household electrics & electronics; including troubleshooting and installation. This can be anything from a washer/dryer, dishwasher, microwave oven, other sordid kitchen electrics and so on. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 217 Posts: 3,867
217 3,867
Troubleshooting Game Consoles & Other Weird Devices
This can be anything from game consoles to arcade games to anything else that doesn't really fit into any of the above categories. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
Topics: 987 Posts: 10,798
987 10,798
Equipment Usage, Soldering, Techniques, and Reviews
Technical discussions concerning soldering techniques, usage of test equipment, how it works, what's best, and some pointers in using it all.
Topics: 1,370 Posts: 19,303
1,370 19,303

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There are currently 716450 users online. 3746 members and 712704 guests.

Most users ever online was 1,196,122 at 03:31 PM on 12-14-2023.

Badcaps Statistics

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Topics: 101,441   Posts: 1,260,008   Members: 486,968   Active Members: 16,925
Welcome to our newest member, SERVEL2000.

Latest Topics

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  • sammus540
    Dell Vostro 3420 BIOS Password Removal
    by sammus540
    I have a Vostro 3420 8H8K5R3​-8FC8 that freeze at any attempt to enter bios password or the recovery master password received from dell. I do not have a clean BIOS image to flash.
    And as luck would have it happened a couple of months ago right outside of the warranty period (Dec 2023) warranty expired in September. Any help or guidance is appreciated.
    Today, 06:33 PM
  • jingleslacks
    Marshall Stanmore II - chip flash
    by jingleslacks
    Hey Friends!

    I have both a live and demo unit. Demo unit firmware disables Bluetooth, power toggle, and other settings. Resets via button combos will not work on these. Reaching out to Marshall is not an option either.

    I copied my live CMOS chip and flashed it to the demo unit, but that didn't fix it (MX25U3235F) This has worked for other devices in the past. I'm not a chip expert, but I'm assuming the firmware is stored in another chip.

    If anyone has any experience or ideas, let's hear them!

    Stanmore II
    Stanmore 2​...
    03-23-2024, 05:09 PM
  • Satvik Hardat
    Well I am dumb to buy a faulty water damaged motherboard from ebay and i need help :)
    by Satvik Hardat
    yesterday i bought this [ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"251","title":"corrossiom.png","width":"354","data-attachmentid":3238358}[/ATTACH]

    I was not high on caffeine but the specs we nice-[LIST][*]Processor: AMD Ryzen 5 4600H 6 x 3 - 4 GHz, Renoir-H (Zen 2)[*]Graphics adapter: AMD Radeon RX Vega 6 (Ryzen 4000/5000)[*]Ram: 16gb DDR4[/LIST]so i bought it now i need schematics and help trouble shooting this all i saw is this burned cap idk what...
    03-19-2024, 05:00 AM
  • sarry86
    Lenovo ThinkPad X250 strange power issue
    by sarry86

    Hello, I have this laptop ThinkPad X250 that has this strange problem, when connected to the main power source, the fan spin once, keyboard lit up for like 2 secs then turns off, only power button remain with solid green light and the ThinkPad icon at the rear lit solid as well, I have tried everything, wiping, writing bioses that users here requested and were given as working for the exactly the specific model but nothing works, the strangest thing is that, even if I completely wipe the bios and blank check it to make sure it is wiped, the laptop still start as mentioned above, have anyone...
    03-20-2024, 01:23 AM
  • bohaboha
    Buying some single smd led diode for tv repair, your advice needed
    by bohaboha
    I'm thinking of buying some single smd led diode for tv repair to have under hand there is so many, 2835 k-6000k 9v.6v, 3v white etc but don't know which to have if you advise me which Should I buy and which is most usual and bäst to have under hand. thank you
    Today, 02:00 PM
  • garretofriviaaaaa
    ASUS GL702V Bios flash
    by garretofriviaaaaa
    Hello all, so basically I have a bricked GL702V with no power except a single LED flash on the power button when it is pressed. Customer had tried to flash his bios with a USB and the GL702VM310 version of this laptop's bios. I've been scouring the web for a correct version of his bios but all the ones on the ASUS website are for GL702VM, GL702VT, GL702VS, or GL702VI with versions varying from 300-310. This specific laptop has nothing other than just the GL702V so I don't know which bios is compatible with it. I was planning on programming it with the CH341A programmer as soon as I found the correct...
    Today, 04:58 PM
  • chth96
    desoldered capacitor is self charging until 0.6 voltage.
    by chth96
    I have an 21 inch CRT TV which is not able to power on.
    I disassembled 21 inch CRT TV and measured voltage of main filter capacitor(Samhwa HC 400WV 220uF) in the circuit.
    It shows 270V on my DMM.

    So I discharged this main filter capactior completely and detached circuit board from cathode-ray tube.
    Then I desoldered this main filter capacitor from circuit board.
    But I noticed that this desoldered large capacitor(Samhwa HC 400WV 220uF) is slowly charged by itself until it reached 0.6V

    I measured its ESR value with MESR-100 and it shows 0.1 ohm,judging...
    Today, 08:56 AM
  • tec3000
    Sony LED 65X9005A shuts down after few seconds - looking for help
    by tec3000
    Hi community! Germany calling I am wondering if you guys can help me out. I have an issue with my Sony LED TV. I've been told this is a good place to ask. Thanks for anyone who will reply and offer advice. Appreciated!

    I have a KD-65X9005A Sony 4k LED TV. For a few weeks I've got this problem where I turn on the TV and within a few seconds the TV starts getting darker until it shuts itself off and I get the 4 blinking error code. HOWEVER there is one exception: Whenever I switch to the i-Manual, a full screen on-screen instruction manual, the TV never turns off. I tested for hours!...
    03-20-2024, 07:29 AM
  • Fronczek
    Lenovo Legion Y520-15IKBM - No power besides the main rail
    by Fronczek
    Hello people,
    I've got this laptop not working for repairs, and as you can see something was done to it as you can see in the coils PL58XX (which I for some reason cannot find in the schematics...) The first FET (PQ201) was not an original part and a questionable one at that and the second one (PQ202) was shorted. Both are N-channel. Ordered replacements for them and replaced them after arrival. Now I have encountered another problem: there is no power at the second FET. By following the thread linked I got to the injection part. Applied 0.8V at 1.5A, but couldn't feel anything getting hot,...
    Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
    Today, 04:18 AM
  • Donny2derby
    Could you run a 3 phase motor using Arduino?
    by Donny2derby
    If you connected in the control wiring onto an inverter could an arduino programmer be used as the controller?

    In my (limited and attempting to learn mind) using the right set of code and some simple wiring this would be relatively simple to achieve??

    Yes?? Or if not can someone tell me why please 🙂

    Thanks 👍🏻
    Today, 03:22 PM

Trending

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  • Fronczek
    Lenovo Legion Y520-15IKBM - No power besides the main rail
    by Fronczek
    Hello people,
    I've got this laptop not working for repairs, and as you can see something was done to it as you can see in the coils PL58XX (which I for some reason cannot find in the schematics...) The first FET (PQ201) was not an original part and a questionable one at that and the second one (PQ202) was shorted. Both are N-channel. Ordered replacements for them and replaced them after arrival. Now I have encountered another problem: there is no power at the second FET. By following the thread linked I got to the injection part. Applied 0.8V at 1.5A, but couldn't feel anything getting hot,...
    Technical discussions covering any type of laptop, notebook, netbook, tablet, or smartphone. Any and all brands and models welcome. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!
    Today, 04:18 AM
  • mecha1166
    QN750Q8FNBFXZA Service Error Codes Needed - Error code 1-3-1-2 ? Dead set, only blinking standby light in repeating sequence
    by mecha1166
    I am working on a QN750Q8FNBFXZA. Dead except the standby light. It blinks what appears to be 1 3 1 2. 1 long blink, pause, 3 short, pause, 1 long, pause, 2 short, pause, repeat. A service manual would be very helpful, or if anyone knows these error codes. Thanks!
    Today, 08:31 AM
  • bohaboha
    Buying some single smd led diode for tv repair, your advice needed
    by bohaboha
    I'm thinking of buying some single smd led diode for tv repair to have under hand there is so many, 2835 k-6000k 9v.6v, 3v white etc but don't know which to have if you advise me which Should I buy and which is most usual and bäst to have under hand. thank you
    Today, 02:00 PM
  • garretofriviaaaaa
    ASUS GL702V Bios flash
    by garretofriviaaaaa
    Hello all, so basically I have a bricked GL702V with no power except a single LED flash on the power button when it is pressed. Customer had tried to flash his bios with a USB and the GL702VM310 version of this laptop's bios. I've been scouring the web for a correct version of his bios but all the ones on the ASUS website are for GL702VM, GL702VT, GL702VS, or GL702VI with versions varying from 300-310. This specific laptop has nothing other than just the GL702V so I don't know which bios is compatible with it. I was planning on programming it with the CH341A programmer as soon as I found the correct...
    Today, 04:58 PM
  • sammus540
    Dell Vostro 3420 BIOS Password Removal
    by sammus540
    I have a Vostro 3420 8H8K5R3​-8FC8 that freeze at any attempt to enter bios password or the recovery master password received from dell. I do not have a clean BIOS image to flash.
    And as luck would have it happened a couple of months ago right outside of the warranty period (Dec 2023) warranty expired in September. Any help or guidance is appreciated.
    Today, 06:33 PM
  • L3git
    Sony TV Model: KDL-42EX440 (To repair or not; Troublshooting)
    by L3git
    Hi everyone! I found this TV on the curb of a residential area. I don’t know if it’s an easy fix, if so I could maybe use a spare TV for one of the rooms. Also to note I think it may have water damage since I picked up after this past rainy weekend. I’ve attached pictures of the TV and possibly the damage as well.For starters I’m just an amateur in understanding how to repair devices but I would like to learn. Also I know a little bit of soldering as long as it’s not complicated. I would like some insight if it’s worth repairing or not. Thank you for taking the time to help me!
    Today, 03:31 PM
  • kawayabonga
    inspiron 7405 2-in-1 bios
    by kawayabonga
    need this bios
    Dell inspiron 7405 2-in-1
    Hellcat 14 ms amd
    19732-1...
    Today, 03:01 PM
  • chth96
    desoldered capacitor is self charging until 0.6 voltage.
    by chth96
    I have an 21 inch CRT TV which is not able to power on.
    I disassembled 21 inch CRT TV and measured voltage of main filter capacitor(Samhwa HC 400WV 220uF) in the circuit.
    It shows 270V on my DMM.

    So I discharged this main filter capactior completely and detached circuit board from cathode-ray tube.
    Then I desoldered this main filter capacitor from circuit board.
    But I noticed that this desoldered large capacitor(Samhwa HC 400WV 220uF) is slowly charged by itself until it reached 0.6V

    I measured its ESR value with MESR-100 and it shows 0.1 ohm,judging...
    Today, 08:56 AM
  • Satvik Hardat
    Well I am dumb to buy a faulty water damaged motherboard from ebay and i need help :)
    by Satvik Hardat
    yesterday i bought this [ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"251","title":"corrossiom.png","width":"354","data-attachmentid":3238358}[/ATTACH]

    I was not high on caffeine but the specs we nice-[LIST][*]Processor: AMD Ryzen 5 4600H 6 x 3 - 4 GHz, Renoir-H (Zen 2)[*]Graphics adapter: AMD Radeon RX Vega 6 (Ryzen 4000/5000)[*]Ram: 16gb DDR4[/LIST]so i bought it now i need schematics and help trouble shooting this all i saw is this burned cap idk what...
    03-19-2024, 05:00 AM
  • samstown
    Hiopos - Cash Touch - Doesn't turn on
    by samstown
    Hello,

    I have this Hiopos Cash system running on android that stopped working without notice. The power supply is ok, there's light on motherboard but when pressing power button it doesn't turn on.
    I've google for schematics but no luck. Motherboard is S2802_V1.3B. I've took some measure and maybe it could be a transistor, the one I am pointing on with the orange arrow on the pics. Does anyone knows this board ?


    Thanks
    Sam...
    Yesterday, 07:26 AM
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