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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: 734
45 734
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 237 Posts: 45,983
237 45,983
Document & Software Archive
Schematics and Boardviews
Share or download schematics and boardview files. Contribute your knowledge or ask questions. Before using please read our Terms of Service.
Topics: 2,114 Posts: 2,214
2,114 2,214
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: 54 Posts: 54
54 54
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: 3,227 Posts: 32,952
3,227 32,952
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: 4,545 Posts: 75,147
4,545 75,147
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: 4,121 Posts: 45,580
4,121 45,580
SpaceNoun
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: 7,323 Posts: 40,707
7,323 40,707
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: 515 Posts: 5,544
515 5,544
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: 34,457 Posts: 338,265
34,457 338,265
Sub-Forums:
BIOS Requests ONLY! (13,717/177,134)
Schematic Requests ONLY! (5,189/30,893)
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: 5,382 Posts: 76,144
5,382 76,144
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: 27,820 Posts: 380,141
27,820 380,141
lotas
by lotas
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: 4,250 Posts: 65,821
4,250 65,821
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: 321 Posts: 1,743
321 1,743
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: 2,432 Posts: 28,161
2,432 28,161
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: 275 Posts: 4,473
275 4,473
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: 1,081 Posts: 11,427
Last Post: Xbox Series X
1,081 11,427
stj
by stj
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: 1,404 Posts: 19,782
1,404 19,782
VaNDAL_UK
Specifications
Laptop, Tablet, & Notebook Specifications
Basic specifications for laptops, tablets, & notebooks. We are constantly adding new content like boardviews, schematics, fixes, and other data here.
Topics: 101,077 Posts: 101,083
101,077 101,083
Server, iMac, & Desktop PC Specifications
Basic specifications for server, iMac, & desktop computers. We are constantly adding new content like boardviews, schematics, fixes, and other data here.
Topics: 8,712 Posts: 8,715
8,712 8,715

What's Going On?

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There are currently 623542 users online. 5369 members and 618173 guests.

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

Badcaps Statistics

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Topics: 216,733   Posts: 1,426,054   Members: 534,964   Active Members: 21,461
Welcome to our newest member, Lucila Godoy.

Latest Topics

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  • Rickkap
    Macbook Pro 14 2021 - A2442 - 820-02098-A not turning on 5v fluctuation
    by Rickkap
    I would like some help with this MacBook if possible. It came in with not turning on and the Magsafe light was off. After inspecting the logicboard i cannot find any liquid damage and also no burnt or shorted components.
    took some measurement and i can see i have fluctuation on PP3V3_S2 and also PP5V_S2_MAIN amongst other rails. Using the thermal camera RC282 & RC283 were pulsing, but after removing these it was still the same.

    I then did some investigation into why the rails were pulsing and noticed that P5VS2_PWR_EN (comes from U8100) is also doing the same thing.....
    11-18-2024, 03:36 AM
  • cheeky2
    Dell XPS One 2720 AIO Liteon PS-3261-9DA not starting up immediately
    by cheeky2
    I suspect the issue is with the power supply Liteon PS-3261-9DA as apparently they are notorious for issues with them. Has anyone else had similar issues where the PC tries to boot up a few times before finally booting up. Now I have opened up the PSU which shows no signs of any capacitors failing. I did remove one capacitor that looked to have an issue however with my peak meter it showed it was within the limits with good very low esr values which was somewhat disappointing!
    I am going to put a Meter leads across the outputs to see how stable they are when it occurs to see what they are...
    Today, 06:52 AM
  • repair-it
    AutoLeap Oscilloscope Handout
    by repair-it
    Searched online but wasn't able to find. Trying to locate a copy of this document - AutoLeap Oscilloscope Handout.
    11-18-2024, 10:09 AM
  • alinformatica
    ThinkCenter M70q 11UB need Bios
    by alinformatica
    Hello friends, I got this device with a bios that was stuck and wouldn't install Windows, I'm trying, but so far I haven't found a compatible bios to be able to record and solder on the machine, I'm counting on your help again.

    Lenovo ThinkCentre Model M70q type 11DU
    Board NM-C621
    Chip GIGA DEVICE 25B127D
    S/N: PE07K70K​
    Today, 03:59 PM
  • AlexVG
    Macbook A1708 820-00840 stays on 5V and doesn't turn on 20V
    by AlexVG
    Hi Everybody,
    I have three 820-00840 main with almost the same problem. They all are breezed at 5V state.
    There were other problems before i fixed them.
    So,
    First of all, I used [B]PCD3215A10[/B] instead of [B]CD3215C00[/B], which I have bought on Aliexpress.
    On the first board, I have mixed PCD3215A10 and CD3215C00.

    in spite of I checked everything according Mon2 article [url]https://logi.wiki/index.php/CD3215_Bootup_Sequence[/url] (Thank you)


    First board has constantly pulsation between SMS and U3200 on the [B]SMBUS_SMC_4_G3H_SCL[/B]...
    Today, 09:31 AM
  • marcus6100
    Dell XPS 15 7590 LA-H331P EDP51 no power
    by marcus6100
    Hi,
    my 7590 spontaniously rebooted and showed "workshop mode press ALT-F" in BIOS post, then worked normally for two days, after shutdown a few hours later is dead and doesn't power on.
    After a few hours of measuring I didn't find anything obvious, although the 2.5 Ohm measured might be too low, but I never fixed a notebook before (only other things like TV power supplys)
    Found the boardview cad and schematics in this forum.

    Voltages +1VALW, +3VALWP, +5VALWP, B+, +SDC_IN, +3V_PCH are ok
    +3VS and +5VS is 0 because signal RUN_ON_EC is 0 and UZ1 doesn't...
    Today, 02:31 PM
  • CapLeaker
    Kenmore 790.74133311 gas range control board 316630005
    by CapLeaker
    Got a Kenmore Kenmore 790.74133311gas range with a control board 316630005 which has a blown PWM. Anybody has an idea what that chip is?...
    11-13-2024, 01:43 PM
  • doctormasry
    hp zbook g3 la0c381p no power
    by doctormasry
    hello
    laptop hp zbook g3 la0c381p no power
    PR315 pin 1 and 4 there is 4 volt
    when i remove pr315 pin 1 and 2 = 19 volt
    but pin 3 and 4 still 4 volt

    pl59 = 450 om
    pl39 = 400 om
    pl40 = 420 om
    pl37 = 550 om
    no short on there coils
    i flash 2 bios ic no new
    i ve 2 laptop same problem
    please help
    and sorry for my english...
    Yesterday, 01:58 PM
  • arber1232
    Hp Zbook 15 g5 not turn on after Reflash BIos
    by arber1232
    Hi Everyone I have a 3 Hp Zbook 15 g5 with motherboard DA0XW2MBAG0 REV-G, the problem at first was because the audio driver was not installed in the bios, the audio was working but in Windows it was not installed, after many attempts to fix it, I thought it was a bios problem because the IC was made elsewhere. I try to program another bin, the laptop does not turn on, it just blinks orange in charging port. I try to write backup, but again the laptop blinks orange. The welding is fine because I have tried many times, I have tried with another chip but no solution. I check its ic has 3.3 v. Please...
    11-09-2024, 02:41 AM
  • SpaceNoun
    Identify a component
    by SpaceNoun
    hello,
    I'm trying to identify this component, by it's a mystery!! Infinite resistance, not a capacitor and when I test it with a T7 or with a multimeter I measure 620 mV like a diode!
    Can someone help me, because I need to replace it on an other board that was corroded?
    Thanks by advance...
    Today, 12:08 PM

Trending

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  • marcus6100
    Dell XPS 15 7590 LA-H331P EDP51 no power
    by marcus6100
    Hi,
    my 7590 spontaniously rebooted and showed "workshop mode press ALT-F" in BIOS post, then worked normally for two days, after shutdown a few hours later is dead and doesn't power on.
    After a few hours of measuring I didn't find anything obvious, although the 2.5 Ohm measured might be too low, but I never fixed a notebook before (only other things like TV power supplys)
    Found the boardview cad and schematics in this forum.

    Voltages +1VALW, +3VALWP, +5VALWP, B+, +SDC_IN, +3V_PCH are ok
    +3VS and +5VS is 0 because signal RUN_ON_EC is 0 and UZ1 doesn't...
    Today, 02:31 PM
  • SpaceNoun
    Identify a component
    by SpaceNoun
    hello,
    I'm trying to identify this component, by it's a mystery!! Infinite resistance, not a capacitor and when I test it with a T7 or with a multimeter I measure 620 mV like a diode!
    Can someone help me, because I need to replace it on an other board that was corroded?
    Thanks by advance...
    Today, 12:08 PM
  • roxboy1984
    Dell Inspiron 15 AC adapter turns off as soon as connected (MB Short)
    by roxboy1984
    Please can someone help me, im trying to find the shorted component as i have a donor board that i can swop components from.

    If i inject 2V/2A on DC in PU4201 gets really hot. ive changed out PU4201 from another board as well as a couple other Mosfets but PU4201 still gets crazy hot when i inject. Any ideas? im still a noob so am learning....
    Today, 10:59 AM
  • alinformatica
    ThinkCenter M70q 11UB need Bios
    by alinformatica
    Hello friends, I got this device with a bios that was stuck and wouldn't install Windows, I'm trying, but so far I haven't found a compatible bios to be able to record and solder on the machine, I'm counting on your help again.

    Lenovo ThinkCentre Model M70q type 11DU
    Board NM-C621
    Chip GIGA DEVICE 25B127D
    S/N: PE07K70K​
    Today, 03:59 PM
  • KYBOSH
    Trying to Save - SONY BRAVIA KD-75X780F - No Picture BUT there’s sound
    by KYBOSH
    Previous owner said TV just went blank one day.
    They attempted to open the back panel and yanked the power connector off the power supply in the meantime.
    Easily fixed that and got the TV to turn on. Backlights come one with everything connected. Good Sign.
    The mainboard shows signs of life (red light on digital audio out is on) but that's about it. Good Sign.
    There is not blinking LED and the most importantly there is LED response and sound when I press the MENU button on remote control. GREAT Sign.

    I just downloaded the [URL="https://www.manualslib.com/manual/3362173/Sony-Kd-75x7800f.html"]Sony...
    Yesterday, 10:12 AM
  • memoslar
    Password removal Lenovo ThinkCentre M70q
    by memoslar
    Hi, i want password removal of Lenovo Thinkcentre M70q please.
    The board is iq6x0il2.
    I attach the bios bin.
    Should i upload the second bios code? (ec)...
    Today, 02:16 AM
  • labello
    Sony KDL-46ex700 led replacement still same issue
    by labello
    Hi guys I have this tv with this problem, I found it one strip led broken so I decided to change all of them (4) but the problem remains, the tv turn on wit sound led on but after second rebottet and then give me red led blinking (6 times) probably is something in the board broken, i replaced some capacitor that have lower value , take some measurements you're will se on the picture, but I don't have any schematic for this tv. Every reply is accepted! Thank you
    11-11-2024, 12:07 AM
  • Honziq
    Backlight problem - Asus M3200WU, board Gapal LA-L291p
    by Honziq
    Hello,

    I have this All-in-one PC, after SSD change there is no picture. I was found out it is a backlight problem, but LEDs are OK. There is 4 led strings each working on 42,4V, but from board is comming only 5V.

    I was repaired many backlights before but this design i will not understand.

    For me it looks like it is waiting for some signal from screen to start up the backlight or something like this. Nothing seems to be damaged or shorted here.

    Can someone explain me please what to do, what to check?

    Thanks....
    Today, 01:24 PM
  • AlexVG
    Macbook A1708 820-00840 stays on 5V and doesn't turn on 20V
    by AlexVG
    Hi Everybody,
    I have three 820-00840 main with almost the same problem. They all are breezed at 5V state.
    There were other problems before i fixed them.
    So,
    First of all, I used [B]PCD3215A10[/B] instead of [B]CD3215C00[/B], which I have bought on Aliexpress.
    On the first board, I have mixed PCD3215A10 and CD3215C00.

    in spite of I checked everything according Mon2 article [url]https://logi.wiki/index.php/CD3215_Bootup_Sequence[/url] (Thank you)


    First board has constantly pulsation between SMS and U3200 on the [B]SMBUS_SMC_4_G3H_SCL[/B]...
    Today, 09:31 AM
  • Maxpower3
    Lenovo Thinkpad Ec Pwd Bypass
    by Maxpower3
    Hello everyone.

    Here is the bypass solution for several Lenovo ECs.
    This has worked on many ECs.
    Only works if password is contained in EC

    I succeeded on many models
    [URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/104872-lenovo-l15-gen-2-ryzen-password-removal-w-vertyanov-successor?p=3217086#post3217086"]https://www.badcaps.net/forum/troubl...86#post3217086[/URL]
    [URL="https://www.youtube.com/channel/UCeF58jC2Bt_adKcguvynjeA"]https://www.youtube.com/channel/UCeF...t_adKcguvynjeA[/URL]...
    03-17-2024, 11:57 AM
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