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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: 42,553
236 42,553
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: 2 Posts: 5
Last Post: ncp81208 datasheet
2 5
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: 3,195 Posts: 32,744
3,195 32,744
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: 4,509 Posts: 74,899
4,509 74,899
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: 3,997 Posts: 44,556
3,997 44,556
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: 6,903 Posts: 37,764
6,903 37,764
Daddy2024
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: 502 Posts: 5,459
502 5,459
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: 32,318 Posts: 309,254
32,318 309,254
Sub-Forums:
BIOS Requests ONLY! (12,886/156,490)
Schematic Requests ONLY! (4,827/28,909)
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: 5,332 Posts: 75,749
5,332 75,749
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: 27,509 Posts: 375,339
Last Post: Pn64f8500
27,509 375,339
tvtimmy
by tvtimmy
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: 4,198 Posts: 65,366
4,198 65,366
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: 307 Posts: 1,690
Last Post: Bios Canon mg 6853
307 1,690
Santana26
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: 2,344 Posts: 27,611
2,344 27,611
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: 228 Posts: 3,942
228 3,942
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: 1,023 Posts: 10,997
1,023 10,997
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: 1,382 Posts: 19,500
1,382 19,500

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There are currently 470322 users online. 4295 members and 466027 guests.

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

Badcaps Statistics

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Topics: 102,998   Posts: 1,277,427   Members: 499,331   Active Members: 18,245
Welcome to our newest member, Ulixes.

Latest Topics

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  • gjgib
    HP Compaq Presario CQ42 powering on, no display. Missing +3VLCD.
    by gjgib
    Hi again guys. I have this motherboard that won't show display even tho it was doing it yesterday. I think something could've past away in the circuit.
    I'd appreciate if anyone who is used to MOBO LCD voltages and circuits could enlighten me since this is the first time I have to deal with it.

    I'm missing [B]+3VLCD.[/B]

    This is the circuit
    [URL=filedata/fetch?filedataid=339573][ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3284862}[/ATTACH][/URL] [URL=filedata/fetch?filedataid=339576][ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3284863}[/ATTACH][/URL]...
    Yesterday, 09:29 PM
  • tvtimmy
    Pn64f8500
    by tvtimmy
    I'm working on the y-main board and I need help figuring out what Q5019 and Q5021 are. They are made by AUK and the first 3 identifying marks are SMK. The rest are blown off and lost. The board is LJ92-01935A....
    06-01-2024, 11:47 AM
  • swerg
    Part selection for possible blown inductor on ASUS GX531-GW-AB76 laptop mobo
    by swerg
    Hey everyone,

    I'm a novice trying to repair my laptop. The LCD screen has an image, but no LED backlight for the image. It also produces an image when connected to an external monitor.
    I have found what I believe to be a blown inductor labeled "L4502" and "120 Ohm" in the schematics (zoomed in image, blue arrow to blown component). I have included an image of the general area of the mobo and an excerpt from the schematics as well.
    I am having trouble selecting a replacement component, which I believe to be a 120 Ohm ferrite bead, from the components...
    Today, 03:39 PM
  • slugpoa
    Samsung Chromebook XE310XBA JOAN-11/15 Rev 1.4 / BA41-02783D Clean dump needed
    by slugpoa
    Bios registered (locked), I will upload the dump here if anyone can help me unlock it.
    Bios cadastrado (bloqueado), farei upload do dump aqui se alguém puder me ajudar a desbloqueá-lo....
    Today, 03:34 PM
  • pastorello
    BIOS request for Acer A315-510P Notebook (Motherboard: nb6301a_mb_v3)
    by pastorello
    Hello,

    I need the BIOS for the Acer A315-510P with the nb6301a_mb_v3 motherboard. Notebook is not turning on and everything indicates that the bios is corrupted, if you could send me a backup​
    Today, 03:22 PM
  • chamalsb
    Singer X455U BIOS need (6-71-w94p0-d02)
    by chamalsb
    [B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    [I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I]
    [B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    [I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I]
    [B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    [I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    Today, 07:26 AM
  • Santana26
    Bios Canon mg 6853
    by Santana26
    i, need dump of printer canon pixma 6853
    QM7-4414​
    06-03-2024, 03:33 AM
  • p.puhakka
    Fujitsu Esprimo K557/24 allinone desktop, boot logo
    by p.puhakka
    Hello forum!

    I have received a lot of help here, regarding bios modding. Very thankful!

    Now I have a lot of Fujitsu K557 desktops, and those have custom bios logo/custom splash screen, and I need to change them to the original Fujitsu logo.

    I am looking for the easiest way, because I have about 40pcs of them, and I think there is some "official" way to do this.

    I have tried a lot of Fujitsu tools, which can inject the logo to the bios file, but no luck.

    Any suggestions? Thanks!
    Today, 11:24 AM
  • Pedro Alves
    Asus Z170 Pro Gaming - doesnt power cycle
    by Pedro Alves
    I have Asus Z170 Pro Gaming motherboard, it's working fine apart from the reset and shutdown commands. It doesn't restart when exit the bios or choose to restart in the operating system. Shut down also doesn't work, everything works normally until the moment it should turn off. The only way to turn off is by keep pressing power button for a few seconds. What could it be? This would be my first motherboard repair
    06-04-2024, 12:57 AM
  • chickenhawk88
    Troubleshooting Razer Blade 15 DA560
    by chickenhawk88
    I started troubleshooting this Razer Blade 15 laptop DA560 motgerboard a while back, due to some shorted 19v, 5v, 1v power rails. I fixed some of components and think 19v rail is good, 5v rail is good, 3v is better but not all way i think, and 1v is still bad. At this point the diode reading on these rails are 19v - 0.032v , 5v - 0.167v, 3 - 0.63v and 1v - 0.005v .

    When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip,...
    Today, 11:35 AM

Trending

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  • pastorello
    BIOS request for Acer A315-510P Notebook (Motherboard: nb6301a_mb_v3)
    by pastorello
    Hello,

    I need the BIOS for the Acer A315-510P with the nb6301a_mb_v3 motherboard. Notebook is not turning on and everything indicates that the bios is corrupted, if you could send me a backup​
    Today, 03:22 PM
  • chickenhawk88
    Troubleshooting Razer Blade 15 DA560
    by chickenhawk88
    I started troubleshooting this Razer Blade 15 laptop DA560 motgerboard a while back, due to some shorted 19v, 5v, 1v power rails. I fixed some of components and think 19v rail is good, 5v rail is good, 3v is better but not all way i think, and 1v is still bad. At this point the diode reading on these rails are 19v - 0.032v , 5v - 0.167v, 3 - 0.63v and 1v - 0.005v .

    When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip,...
    Today, 11:35 AM
  • swerg
    Part selection for possible blown inductor on ASUS GX531-GW-AB76 laptop mobo
    by swerg
    Hey everyone,

    I'm a novice trying to repair my laptop. The LCD screen has an image, but no LED backlight for the image. It also produces an image when connected to an external monitor.
    I have found what I believe to be a blown inductor labeled "L4502" and "120 Ohm" in the schematics (zoomed in image, blue arrow to blown component). I have included an image of the general area of the mobo and an excerpt from the schematics as well.
    I am having trouble selecting a replacement component, which I believe to be a 120 Ohm ferrite bead, from the components...
    Today, 03:39 PM
  • slugpoa
    Samsung Chromebook XE310XBA JOAN-11/15 Rev 1.4 / BA41-02783D Clean dump needed
    by slugpoa
    Bios registered (locked), I will upload the dump here if anyone can help me unlock it.
    Bios cadastrado (bloqueado), farei upload do dump aqui se alguém puder me ajudar a desbloqueá-lo....
    Today, 03:34 PM
  • p.puhakka
    Fujitsu Esprimo K557/24 allinone desktop, boot logo
    by p.puhakka
    Hello forum!

    I have received a lot of help here, regarding bios modding. Very thankful!

    Now I have a lot of Fujitsu K557 desktops, and those have custom bios logo/custom splash screen, and I need to change them to the original Fujitsu logo.

    I am looking for the easiest way, because I have about 40pcs of them, and I think there is some "official" way to do this.

    I have tried a lot of Fujitsu tools, which can inject the logo to the bios file, but no luck.

    Any suggestions? Thanks!
    Today, 11:24 AM
  • chamalsb
    Singer X455U BIOS need (6-71-w94p0-d02)
    by chamalsb
    [B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    [I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I]
    [B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    [I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I]
    [B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    [I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
    Today, 07:26 AM
  • mrsith
    Samsung WD80N645OOW died mid-cycle
    by mrsith
    Hi fellow lifesavers.

    I have a Samsung washer-dryer WD80N645OOW which died mid-cycle. No response to anything, completely dead.

    Checked the socket, the plug fuse, all good. Took it out to examine the boards.

    There is a relay clicking on the mainboard. Upon applying power, I can see a diode flashing on inverter board, after a while a diode on main board lits up for a split second, then I can hear a relay clicking. This repeats a few times, then everything dies completely.

    I've been trying to examine the main board, but it's a bit difficult becuse...
    Today, 09:11 AM
  • antibotan
    Asus X571LI filled in, need a piece of diagram or photo of the area
    by antibotan
    daxktdmb8c0
    Maybe someone has a photo of a section of the board, otherwise there are no diagrams or boardview...
    Yesterday, 12:31 PM
  • Omron
    I want to dim light bulb by 50% I want to learn how to calculate it on my own
    by Omron
    I have a 5W lamp on 12Volts battery, I want it to be half as bright, so I will add a resistor. What resistor should I supply?

    A = W = 5 = 0.416mA
    _ _
    V 12


    R = V = 12 = 28.84 Ohms (R) this is resistance of lamp
    _ _____
    I 0.416

    So I will add one resistor 28.84 Ohms

    I will have 28.84 + 28.84 = 57.6 Ohms

    Or 28.84 + 28.84 = 14.42 Ohms

    I don't know if it will work in series or in parallel
    voltage would be 6V and amp current mA = 0.208mA We divide everything by two

    W= V * I...
    06-04-2024, 01:58 AM
  • PycLaH
    Chromebook e100 2nd Gen
    by PycLaH
    [B]Chromebook e100 2nd Gen - Bios enable Developer Mode and remove Managed by...[/B]

    I Have Chromebook e100 2nd Gen,
    Please can you enable Developer mode and remove managed by ... please
    mlb_serial_number: [B]1532022002872[/B]
    serial_number: [B]PF2TKV5V[/B]
    model_name: [B]Lenovo 100e Chromebook 2nd Gen[/B]
    mfg_date: [B]2021-04-19[/B]
    [B]Chromebook e100 2nd Gen - Bios enable Developer Mode and remove Managed by...[/B]

    I Have Chromebook e100 2nd Gen,
    Please can you enable Developer mode and remove managed by ... please
    mlb_serial_number:...
    Yesterday, 12:57 PM
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