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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: 733
45 733
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 236 Posts: 42,291
236 42,291
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: 4
Last Post: ncp81208 datasheet
1 4
BAKEEL1990
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: 3,190 Posts: 32,713
3,190 32,713
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: 4,502 Posts: 74,874
4,502 74,874
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: 3,984 Posts: 44,458
3,984 44,458
truclacicr
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: 6,866 Posts: 37,555
6,866 37,555
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: 501 Posts: 5,455
501 5,455
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: 32,142 Posts: 307,306
32,142 307,306
Sub-Forums:
BIOS Requests ONLY! (12,818/155,045)
Schematic Requests ONLY! (4,790/28,737)
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: 5,329 Posts: 75,732
5,329 75,732
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: 27,486 Posts: 375,148
27,486 375,148
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: 4,190 Posts: 65,294
4,190 65,294
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: 304 Posts: 1,675
304 1,675
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: 2,337 Posts: 27,571
2,337 27,571
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: 226 Posts: 3,951
226 3,951
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: 1,008 Posts: 10,917
1,008 10,917
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: 1,381 Posts: 19,459
1,381 19,459

What's Going On?

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There are currently 340737 users online. 4317 members and 336420 guests.

Most users ever online was 1,342,976 at 10:51 PM on 04-26-2024.

Badcaps Statistics

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Topics: 102,693   Posts: 1,274,383   Members: 496,187   Active Members: 17,154
Welcome to our newest member, WMD3141.

Latest Topics

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  • chh0596
    DELL LA-k472P GDP70
    by chh0596
    Need schematic or board view
    GDS70 LA-K472P DELL ALIENWARE X17 R1
    thank​
    Yesterday, 05:53 AM
  • max2711
    Samsung BN44-00757a schematic
    by max2711
    Hi
    i need schematic for Samsung BN44-00757a power board.
    TV model: UE48H5003
    Thank You
    Today, 11:27 AM
  • ResoluteHawk
    ASUS GA401QM No ACDRV, No CMSRC
    by ResoluteHawk
    I have an Asus G14 (GA401QM) that has a power issue. Originally the board had a shorted 5V rail and dead EC. I reballed a working EC, soldered it on, and I resolved the 5V issue by replacing the APL6012 and the low side 5V mosfet. Resistances on all power rails are healthy now, but 20V does not make it through the first MOSFET. 20V is present on the drain of the first MOSFET, but there is no voltage on the gate or source.

    When diagnosing this issue, I thought that the issue was due to the BQ24800 chip not outputting the correct signals so I soldered on a known working chip and the...
    05-08-2024, 01:30 PM
  • therealraffles
    Galaxy Buds FE SM-R400
    by therealraffles
    Hey all

    I have a set of FE buds, the right side will not connect, I don’t believe it is even charging..I am able to connect and get audio through the left, the case appears to charge itself and the left correctly.

    The left has ~1.3v between the pins, the right side has ~-0.7v ..

    This is wonky, surely? My assumption would at least be the same charging voltage, even if the..

    can someone confirm that the earbuds polarity is different?

    I may try and inject 1.3v onto the charging pads of the right, if it will take even a little charge...
    Today, 11:13 AM
  • FrozenHaxor
    Lenovo ideapad 520, NM-B452 not powering up
    by FrozenHaxor
    Hey, I'm repairing a board from liquid damaged laptop, managed to get 5V and 3.3V rails up, some passives were corroded away. Only problem right now is no reaction to power button, there is no PCH_PWR_EN signal, DPWROK_EC is 2.5V, +1.0VALW is missing. Replaced KBC with brand new one, reprogrammed. No change. Any ideas? Schematic and boardview are available, attached them at the bottom. Boardview file can be opened by "BoardViewer" software.



    Please don't mind the damage near UC4, it was caused by liquid damage and there is battery connector on the other side,...
    Today, 11:10 AM
  • ianbak
    BQ24735 Problem (HP 255 G8)
    by ianbak
    Hi,

    I have an HP 255 G8 that runs for as long as its battery holds charge but won't accept AC power.

    I have partially diagnosed the problem and the issue seems to be that there is no ACDRV output from the BQ24735 to turn on the two input MOSFETs. The 24735 has a VCC of 19.57 V, the ACDET input is at 2.93 V and the REGN 6V LDO is outputting 5.98 V, so everything looks good - but ACDRV is stuck at 28 mV.

    I've already replaced the 24735 and both input MOSFETs and nothing has changed.

    I'd appreciate some suiggestions as to what to try next.
    05-20-2024, 08:45 AM
  • Demonhill
    Bios Password forgotten in Thinkpad P15S
    by Demonhill
    Hello guys yesterday i opened a post to request the help in removing password from this laptop but i don't know why my postit's now removed. I don't think to broke the rules but maybe the link for the dump was the problem. Anyway i opened again the request hoping that someone can help and that im not doing anything wrong. Thanks
    Yesterday, 01:11 AM
  • skyline_bogota
    Lenovo S410P charging IC
    by skyline_bogota
    GOOD DAY,
    I NEED HELP SOMEONE KNOWS WHAT CHARGING IC HANDLES THIS BOARD, IT IS FROM A LENOVO S410P, BUT I REMOVED THE INTEGRATED ONE AND IT IS IN VERY BAD CONDITION YOU CAN'T SEE THE LETTERS.

    IT'S A "BQ​"...
    Yesterday, 11:44 AM
  • Khaldun Murad
    HP Elitedesk 800 G5 Desktop mini MPM Locked
    by Khaldun Murad
    Well hi to all
    The big question: Is there any hope?😎
    I think about 36 hours ago I begin my journey to find a solution for my pc model with no luck.
    BCU: Access denied
    Efi Shell: Hp Protocol Something etc..
    I am not that experience, "but I can fight my way through"
    What to do guys?
    To be or not to be is not the question anymore.
    Today, 10:02 AM
  • mo000
    DELL 3576 weird issue
    by mo000
    hi
    i have dell 15 3576 i7 8th comes with weird issue
    the laptop each random period maybe after 1 or 2 weeks not power on unless remove the cmos battery and reset the bios
    i try update the bios but the same issue
    what is the reason ?
    is something about RTC circuit ?
    any idea before i start the diagnostic .
    Yesterday, 04:20 AM

Trending

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  • Tehzeeb
    I need DS-7104hghi-k1 80388 firmware
    by Tehzeeb
    I need ds-7104hghi-k1 80388 firmware
    my attached bios is password protected
    Today, 08:42 AM
  • Khaldun Murad
    HP Elitedesk 800 G5 Desktop mini MPM Locked
    by Khaldun Murad
    Well hi to all
    The big question: Is there any hope?😎
    I think about 36 hours ago I begin my journey to find a solution for my pc model with no luck.
    BCU: Access denied
    Efi Shell: Hp Protocol Something etc..
    I am not that experience, "but I can fight my way through"
    What to do guys?
    To be or not to be is not the question anymore.
    Today, 10:02 AM
  • sewsulle
    A2442 820-02098 5v 0a
    by sewsulle
    Good afternoon,
    I'd appreciate help diagnosing my A2442 that's only taking 5v and 0a

    This was my personal laptop and I had closed it at the end of a class and opened it in the next class when it just didn't wake up from sleep (The battery was charged). I connected a charger later that night and it booted right up but touch ID stopped working. The next day it did the same thing but never turned back on when I plugged in a charger.

    I though the touch ID issue was weird but I'm not sure if that info helps.

    When this happened months ago I tried to diagnose...
    Yesterday, 07:56 PM
  • neo2010
    Lenovo X1 Carbon Gen 2 Touchscreen Firmware needed
    by neo2010
    Hello,

    I accidentally flashed the wrong firmware to my Lenovo Laptop Touchscreen. Now it is not recognized anymore in Windows 10. With Linux, I get the Device Listed as ELAN 04f3:000b USB device. I have modified the original Lenovo Flash Tool and tried other Firmware bin files but without success.
    The screen is the WHQD version. Can anyone provide a firmware bin file to reflash the touchscreen controller? As it seems that the controller is in recovery mode.

    Thanks in advance
    Today, 08:04 AM
  • max2711
    Samsung BN44-00757a schematic
    by max2711
    Hi
    i need schematic for Samsung BN44-00757a power board.
    TV model: UE48H5003
    Thank You
    Today, 11:27 AM
  • therealraffles
    Galaxy Buds FE SM-R400
    by therealraffles
    Hey all

    I have a set of FE buds, the right side will not connect, I don’t believe it is even charging..I am able to connect and get audio through the left, the case appears to charge itself and the left correctly.

    The left has ~1.3v between the pins, the right side has ~-0.7v ..

    This is wonky, surely? My assumption would at least be the same charging voltage, even if the..

    can someone confirm that the earbuds polarity is different?

    I may try and inject 1.3v onto the charging pads of the right, if it will take even a little charge...
    Today, 11:13 AM
  • FrozenHaxor
    Lenovo ideapad 520, NM-B452 not powering up
    by FrozenHaxor
    Hey, I'm repairing a board from liquid damaged laptop, managed to get 5V and 3.3V rails up, some passives were corroded away. Only problem right now is no reaction to power button, there is no PCH_PWR_EN signal, DPWROK_EC is 2.5V, +1.0VALW is missing. Replaced KBC with brand new one, reprogrammed. No change. Any ideas? Schematic and boardview are available, attached them at the bottom. Boardview file can be opened by "BoardViewer" software.



    Please don't mind the damage near UC4, it was caused by liquid damage and there is battery connector on the other side,...
    Today, 11:10 AM
  • totto210
    lenovo legion 5 15-lmh05 nm-c911 charger problems
    by totto210
    Hi guys, well the summary is this:
    the equipment arrived because it did not turn on (it had been the original 230w source the problem) then I feed with my regulated source and without wanting to invert the poles. the equipment turned on and turned off.
    This damaged the charger and its mosfets both high and low switching.
    It also damaged the input mosfet (pq102).
    by chance i had another lenovo legion just like this one and i removed the components and tried to turn it on and it turned on but ....... it burned again the high and low mosfets and switch (pq104, pq105, pq103)....
    Today, 10:03 AM
  • hamzafox
    Lenovo V15 G4 AMN need bios
    by hamzafox
    motherboard code KV481/KV581/ NM-F051 Rev 1.0
    cpu R5 7000 SERİES
    S/N.PF4K7WNG
    [B]There is no backup[/B]​motherboard code KV481/KV581/ NM-F051 Rev 1.0
    cpu R5 7000 SERİES
    S/N.PF4K7WNG
    [B]There is no backup[/B]​
    motherboard code KV481/KV581/ NM-F051 Rev 1.0
    cpu R5 7000 SERİES
    S/N.PF4K7WNG
    [B]There is no backup[/B]​
    Today, 09:43 AM
  • farouk_1994
    hp elitbook 845 G10 bios locked
    by farouk_1994
    Hello please need bios unlock for hp elitbook 845 G10
    Sn:5CG41056NC...
    Today, 07:06 AM
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