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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: 234 Posts: 41,462
234 41,462
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: 3,177 Posts: 32,633
3,177 32,633
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: 4,491 Posts: 74,773
4,491 74,773
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: 3,959 Posts: 44,233
3,959 44,233
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: 6,766 Posts: 37,020
6,766 37,020
Prott
by Prott
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: 31,642 Posts: 300,879
31,642 300,879
Sub-Forums:
BIOS Requests ONLY! (12,607/151,201)
Schematic Requests ONLY! (4,700/28,224)
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: 5,313 Posts: 75,652
5,313 75,652
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: 27,407 Posts: 374,097
Last Post: Samsung ue49mu6120
27,407 374,097
Davi.p
by Davi.p
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: 4,169 Posts: 65,135
4,169 65,135
stj
by stj
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: 300 Posts: 1,661
300 1,661
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: 2,308 Posts: 27,382
Last Post: Onkyo TX-DS575
2,308 27,382
frankusb
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: 219 Posts: 3,886
219 3,886
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: 996 Posts: 10,836
996 10,836
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: 1,373 Posts: 19,313
1,373 19,313

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There are currently 556748 users online. 4116 members and 552632 guests.

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

Badcaps Statistics

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Topics: 101,808   Posts: 1,264,227   Members: 489,828   Active Members: 16,235
Welcome to our newest member, Revolt Music.

Latest Topics

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  • monitron
    Help identify part
    by monitron
    I am working on a HP Pavilion 27-d0010nd that has dark screen. It appears that the backlight is not working.
    Now i discovered that the backlight circuit is on the scalar board and has a burnt mosfet. (caused by a ceramic capacitor short).

    If anybody can help me identify the partnumber it would be a very great help.

    The board number is:

    L76838-001
    L99794-001
    BigBen Scalar board.



    [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3253797}[...
    Today, 07:53 AM
  • Carl0s-
    iPad 5th gen (A1823) - No charge but recognized by finder
    by Carl0s-
    Hi,

    Sooo - our IT got a pile of old iPads that the sales guys have been mistreating. These are free for grabs if you want to try to get one working. Thought I'd give it a try - if I get at least some life to I can give to my kid to entertain during a car rides.

    But the iPad it self - its a 5th gen cellular model. When I initially plug it in it was completely dead. It was not recognized by my Mac nor it started to charge. Disassembled it opened up the battery connector and checked the battery voltage. My multimeter showed 0,7v. Had a spare micro-usb charging board lying...
    Yesterday, 12:51 PM
  • Nopslide
    HP Omen 15-dh0052nf power-on & bios password
    by Nopslide
    Hello everyone, I come here to tell you my problem regarding the power-on password. It is not a bios reset demand, and i can't have any access to windows. This is the bios and power-on password that is blocking all other things.

    My Omen 15-dh0052nf purchased second-hand was configured with the bios password upon purchase (very simple password :P ).

    Having decided to sell it in order to get something more powerful, I reset all BIOS settings and set a blank administrator password. But the power-on password cannot be changed to a blank one so I let the actual password set....
    04-01-2024, 04:27 PM
  • Super360
    Samsung/UN65H6300AF LOGO APPEARS AND SHUTS OFF
    by Super360
    Hi as you can see from title, I have a samsung tv here that will show the smart tv logo and then no picture after that even hitting input or menu on remote and shows nothing but the backlight still appears to be on. The tv will turn itself off after a minute or so automatically. I'm somewhat confused if this is either a eeprom problem or a bad led strip problem. The power supply makes a pretty noticeable humming sound when it's turned on leading me to believe one of the leds are shorted but idk honestly. Any of you guys have any help for me? I have a good multi meter and can take pictures of whatever...
    04-13-2024, 10:05 PM
  • cap__
    How to replace SMD blue Led with conventional red LED?
    by cap__
    "I heard that a blue LED has different voltage values than green and red ones. Green and red ones are easily replaceable, but how do I do that with the blue one?"

    "I have to use the blue one, because green means fully charged and blue means charging."





    [ATTACH=JSON]{"data-align":"none","data-size":"full","title":"20240415_172809.jpg","data-attachmentid":3253246}[/ATTACH]...
    Yesterday, 09:59 AM
  • jaroslav.psenicka
    Lenovo Yoga 2 13 LA-A921P - missing SYSON
    by jaroslav.psenicka
    Hi all,

    I have a LA-A921P here on AC adapter[LIST][*]power LED on[*]button SW1 (power) pressed[*]the CPU gets warm[*]fan not spinning[*]no dead short found anywhere[*]+5VALW/+3VALW present[*]DDR_VTT_PG_CTRL is 5V[*]SYSON is 0V[/LIST]the +0.675VSP and +1.35VP is missing, assuming because of missing SYSON signal
    SYSON is not shoted to ground
    the SYSON is generated by U51 hope it's not it

    Is there anything i can test?

    Many thanks,

    -jp
    • Hi all,

      I have a LA-A921P here on AC adapter[LIST]
    • power LED on
    • button SW1 (power)
    Today, 06:38 AM
  • gogunet
    BIOS for LENOVO LEGION 5 PRO 16ITH6H
    by gogunet
    LENOVO LEGION 5 PRO 16ITH6H
    S/N PF2RCD7F
    MTM 82JD000WRM

    The laptop won't start. It reads the power button, keyboard lights up, it charges, but no display.
    Need a working bios.


    Thanks!​
    Today, 06:14 AM
  • wolf1976
    lg 49uj634
    by wolf1976
    hi to all in this tv i have problem with the colours you can see on the video from normal changed to purple
    is like solarized picture on your opinion and caused from gamma ic or is display?
    thanks on advance...
    04-14-2024, 12:18 PM
  • slavetothesound
    HP 800 G6 mini - no POST, no video, no beeps
    by slavetothesound
    Emboldened by an easy experience using my new T48 to remove bios password from a used machine of the same model (thanks badcaps), I ordered an ‘as-is’ HP 800 G6 Mini thinking it might be an easy fix. Now it looks like the bios chip has been removed and soldered back already, so I think I might be wasting my time with this board - someone more skilled has already tried…

    Anyway, the fans spin up on this guy and there are a couple LEDs on the board, but there is no other sign of life. No video, no beep pattern, no keyboard. Since there’s so little feedback, I’m feeling out...
    04-06-2024, 02:09 PM
  • Radio Fox
    Acer AL1916 monitor PSU repair (DM0565R blown)
    by Radio Fox
    I'm repairing an Acer AL1916 monitor PSU at the moment. The 400v high voltage smoothing capacitor C114 is measuring completely O/C. The case of U101 has blown apart. Fuse F101 has blown. ZD121 reads 6 Ohms in both directions & ZD120 reads 99 Ohms in both directions. While looking at the data sheet of U101 (DM0565R), I noticed that the absolute maximum voltage for Vcc is 20v. However, the zener diode across the Vcc pin to GND is a 1N4748A (22v).

    Now, whether that zener is used to constantly regulate the voltage, or whether its's used to protect the Vcc voltage from rising too high,...
    04-13-2024, 06:32 AM

Trending

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  • gogunet
    BIOS for LENOVO LEGION 5 PRO 16ITH6H
    by gogunet
    LENOVO LEGION 5 PRO 16ITH6H
    S/N PF2RCD7F
    MTM 82JD000WRM

    The laptop won't start. It reads the power button, keyboard lights up, it charges, but no display.
    Need a working bios.


    Thanks!​
    Today, 06:14 AM
  • EazyBone
    Hisense 85h6570g glitch?
    by EazyBone
    Got this massive TV and tested they backlights and they were out. Took it all apart and replaced them. Put it back together and boom they work! I then run it for many hours and all still working. I then needed to factory reset to pass on to next person and...

    I factory reset and it shows Hisense logo fully lit up, then Google logo for a couple of seconds and forces shut off. Now that's all the TV does. Hisense, Google logo force shutoff. How is this possible.. anyone have some experience or advice for this. All I can think is somehow I got a software corruption which is ridiculous...
    Yesterday, 07:31 AM
  • jaroslav.psenicka
    Lenovo Yoga 2 13 LA-A921P - missing SYSON
    by jaroslav.psenicka
    Hi all,

    I have a LA-A921P here on AC adapter[LIST][*]power LED on[*]button SW1 (power) pressed[*]the CPU gets warm[*]fan not spinning[*]no dead short found anywhere[*]+5VALW/+3VALW present[*]DDR_VTT_PG_CTRL is 5V[*]SYSON is 0V[/LIST]the +0.675VSP and +1.35VP is missing, assuming because of missing SYSON signal
    SYSON is not shoted to ground
    the SYSON is generated by U51 hope it's not it

    Is there anything i can test?

    Many thanks,

    -jp
    • Hi all,

      I have a LA-A921P here on AC adapter[LIST]
    • power LED on
    • button SW1 (power)
    Today, 06:38 AM
  • _Margo_
    Need bios Thunderobot 911x (or Hasee s8d6)
    by _Margo_
    Hello friends.
    I need bios on Thunderobot 911x (or Hasee s8d6) DANLXBMB8C0 REV: C NLXB
    Thanks
    Today, 01:10 AM
  • admac
    Lenovo m80q tiny - bios need
    by admac
    hi,
    someone have bios for lenovo m80q tiny 11DQ?
    please help
    Today, 03:21 AM
  • pavithra
    LC6685 based LED drivers
    by pavithra
    I have 50 Chinese constant current isolated LED drivers based on LC6685 IC. 35 drivers are working fine, but there is a slight flickering in the rest of the drivers.
    I have checked the output with oscilloscope and found that there is a slight random voltage fluctuation.
    Is it possible to get the datasheet of LC6685 IC?
    Also highly appreciate if you could let me know what could go wrong....
    Today, 02:46 AM
  • Carl0s-
    iPad 5th gen (A1823) - No charge but recognized by finder
    by Carl0s-
    Hi,

    Sooo - our IT got a pile of old iPads that the sales guys have been mistreating. These are free for grabs if you want to try to get one working. Thought I'd give it a try - if I get at least some life to I can give to my kid to entertain during a car rides.

    But the iPad it self - its a 5th gen cellular model. When I initially plug it in it was completely dead. It was not recognized by my Mac nor it started to charge. Disassembled it opened up the battery connector and checked the battery voltage. My multimeter showed 0,7v. Had a spare micro-usb charging board lying...
    Yesterday, 12:51 PM
  • Gecko-EC
    HP Probook 430 G2
    by Gecko-EC
    Hi Guys, I hope someone can assist me me. I have a HP Probook G2. It came in for not charging. When charger plugged in power light on the charge port was flickering as well as the caps lock light. Not a pattern, but inconsistent. I found a faulty mosfet on the power input which I replaced. Problem I have is that it does not start up without a battery unless I use a 18.5v charger. It does however start with the 19.5v with the battery installed, but the battery charge voltage is 2.58v. The required charger for this unit is a 19.5v of which I have tried several. The battery is bad and have ordered...
    04-14-2024, 07:37 AM
  • Astray
    MSI GS75 No Power
    by Astray
    Hello, working on a laptop (MSI GS75 9SG-242US, Core i7-9750H, 2080 Max Q) and after replacing the screen and forgetting to disconnect the battery prior, I have no visible indications of power anywhere. It was working perfectly fine prior to the screen removal and replacement. Checked the motherboard PCB visually near the LCD connectors and didn't really see any indications of damaged surface mounted components but haven't looked under a microscope yet.

    Battery charging light isn't turning on when plugged in and pressing the button does nothing regardless of being on battery power...
    04-14-2024, 09:35 AM
  • SkullMurray
    What may cause a quarter fan spin on a Mac mini 820-5509-A board?
    by SkullMurray
    Hi all, I' m a newbie in troubleshooting but I'd like to solve a quarter fan spin issue on a 820-5509-A board. Where should I start to solve this problem? Any suggestion is useful! Thank you!
    Today, 03:20 AM
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