Badcaps Electronics Repair Forum & Schematic Search

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Badcaps Capacitor & Electronics Repair Forum

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Topics: 46 Posts: 735

Last Post: Capacitor nominal value

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Capacitor nominal value

by Thermaltake

01-04-2025, 01:24 PM

Announcements & Related News

Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!

Topics: 239 Posts: 50,606

Last Post: New Members - please post your introductions here

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50,606

New Members - please post your introductions here

by Zeemo

Yesterday, 11:42 PM

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: 2,160 Posts: 2,567

Last Post: NVIDIA GeForce RTX 3080 / RTX 3090 Schematic & Board View

2,160

2,567

NVIDIA GeForce RTX 3080 / RTX 3090 Schematic & Board View

by Areos

Yesterday, 04:04 PM

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: 59 Posts: 69

Last Post: tcl t-con board 30840-000035 looking for datasheet or ribbon pinout

tcl t-con board 30840-000035 looking for datasheet or ribbon pinout

by oldham50

05-06-2025, 01:40 PM

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: 3,260 Posts: 33,218

Last Post: Help Identify cap brand and quality, please

3,260

33,218

Help Identify cap brand and quality, please

by PeteS in CA

06-10-2025, 10:24 AM

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: 4,585 Posts: 75,481

Last Post: The 2025 Operating System Thread

4,585

75,481

The 2025 Operating System Thread

by dmill89

Yesterday, 11:29 PM

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: 4,274 Posts: 47,070

Last Post: Should I take this undertaking “ Fault & Not Work 8000W LF Split Phase Pure Sine Wave Power Inverter DC24V/AC110V”

4,274

47,070

Should I take this undertaking “ Fault & Not Work 8000W LF Split Phase Pure Sine Wave Power Inverter DC24V/AC110V”

by CapLeaker

Yesterday, 07:42 PM

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: 7,882 Posts: 44,462

Last Post: Bios Dell Optiplex 3050 Micro

7,882

44,462

Bios Dell Optiplex 3050 Micro

by hoaca388

Yesterday, 06:48 PM

Sub-Forums:

BIOS & Schematic Requests! (3,352/21,777)

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: 532 Posts: 5,642

Last Post: tenda v12 ac1200 modem

532

5,642

tenda v12 ac1200 modem

by dahm

05-31-2025, 01:54 PM

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: 36,959 Posts: 379,119

Last Post:

36,959

379,119

by zhaoriwei1103

Yesterday, 05:10 AM

Sub-Forums:

BIOS Requests ONLY! (14,639/206,673)

Schematic Requests ONLY! (5,602/33,386)

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: 5,438 Posts: 76,403

Last Post: I need a BIOS dump for the Samsung S49CG934SU monitor

5,438

76,403

I need a BIOS dump for the Samsung S49CG934SU monitor

by Habble7

Yesterday, 05:34 AM

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: 28,137 Posts: 384,119

Last Post: TCL55p615 problem

28,137

384,119

TCL55p615 problem

by tiki66

Today, 12:25 AM

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: 4,331 Posts: 66,593

Last Post: Artesyn 3T12AP DC to DC regulator

4,331

66,593

Artesyn 3T12AP DC to DC regulator

by Agent24

Yesterday, 05:06 PM

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: 355 Posts: 1,880

Last Post: help Samsung sl-m2022w dump

355

1,880

help Samsung sl-m2022w dump

by DumpCraft

06-11-2025, 05:42 PM

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: 2,518 Posts: 28,779

Last Post: Marshall Stanmore II voice with the google assistant built-in

2,518

28,779

Marshall Stanmore II voice with the google assistant built-in

by malycinek

Yesterday, 10:54 PM

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: 316 Posts: 4,889

Last Post: Hoover FM216LI cordless vacuum refuses to charge

316

4,889

Hoover FM216LI cordless vacuum refuses to charge

by sam_sam_sam

Yesterday, 06:24 PM

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: 1,171 Posts: 12,070

Last Post: Motorola Minitor V pager no audio / sound repair

1,171

12,070

Motorola Minitor V pager no audio / sound repair

by CapLeaker

06-11-2025, 04:37 PM

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: 1,417 Posts: 19,882

Last Post: Desoldering - soldering BGA chip close plastic mini fpc connectors ?

1,417

19,882

Desoldering - soldering BGA chip close plastic mini fpc connectors ?

by Unspun01

05-27-2025, 02:37 PM

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: 101,079 Posts: 101,091

Last Post: Acer Aspire AV15-52 Notebook Vero Specification for Upgrade or Repair

101,079

101,091

Acer Aspire AV15-52 Notebook Vero Specification for Upgrade or Repair

by Doctorbst

04-02-2025, 09:28 PM

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: 8,720

Last Post: LENOVO ThinkStation D30 ThinkStation D E5-2620 Specification for Upgrade or Repair

8,712

8,720

LENOVO ThinkStation D30 ThinkStation D E5-2620 Specification for Upgrade or Repair

by JBUU

05-19-2025, 07:35 AM

Mark Channels Read

TCL55p615 problem

by Term1903

Hello Everyone

I hope you are all well..

I have problem with my TCL 55p615 tv

two months after warranty expires, tv started freezing while watching sat tv ,youtube video or movies from usb, only after 2 minutes,
but interestingly, tv working good with external source, such as an apple tv connected over hdmi port, I can watch any 4k movies any 4k videos from youtube without any problem ,
but on its own android interface it is freezing(both video audio and also menu freezing) only in two minutes,
when freezed ,only thing I can do...

1 Photo
- Channel: Troubleshooting TVs and Video Sources
Yesterday, 08:47 AM
Zotac GTX 1080 8GB / No video / Error reported on all memory modules!

by gabrielA7

Hi guys!!

I have this video card on my bench, it turns on and the screen goes black!

I used MATS but it showed an error in all memory modules, when writing!

I once got a 1060 with the same symptom, all modules were defective, I rebaled the GPU and it stayed the same.

Remember that I have all the debts ok, 1.35 Vram and such!

Could the problem really be in the GPU?

Could it be the BIOS?

Thank you in advance!
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
06-05-2025, 09:04 AM
rtx 3090 FTW3 no power

by V4Vtwo

have a rtx3090 with no power, can someone tell me if 1.4ohm on PS_NVVDD_DRVON is normal (pin31 on AOZ5311)?
i checked all the voltage rails and fuses and they seem okay 12v. but i am missing PS_5V_PGOOD
closest schematic i found is:
MS_v389
NVIDIA_GeForce_RTX_3090_600-1G132-0030-300_PG132-A02_Rev_C_

this is readings from U31
PS_5V_EN 2.5v
PS_5V_SW_VCC 5V
PS_5V_SW_BOOT 9.84v
PS_5V_PGOOD 0v
PS_5V_SW_PHASE 5v
12V_EXT8_F1_RTD3 12v

thank you
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
06-09-2025, 07:27 PM
Legion Y540 17irh motherboard issue ( need help to know how to diagnose my motherboard)

by Docus

Hi everyone 😀,

I'm here today to ask for help with repairing the motherboard of a [B]Lenovo Legion Y540 17IRH[/B].

To give you some context, I'm passionate about computer repair so much so that I've invested in a lot of tools and started practicing on dead and old hardware. I've been learning how to solder and desolder components, mostly focusing on phone repairs.

Recently, I bought a broken Lenovo Legion Y540 17IRH for just €150, and there are two main reasons why I made this purchase:[LIST=1][*][B]I already own the exact same model[/B], but its plastic...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
06-10-2025, 04:24 PM
HP16 DAG3MMB3AAO REV A No power on, no led charger

by judamex

I have an HP 16 DAG3MMB3AAO REV A. The charge LED doesn't turn on.
So far, I've checked the three input MOSFETs, and all three seem to be in perfect condition. The charge IC is a BQ24781. The voltages I've checked are:
VCC: 19V
REGN: 6V
ACDET: 2.45
ACOK: 2.85

It's striking that I don't have voltages on the ACP, ACN, and CMSRC.
I'm a bit stuck on how this controller works and why it won't turn on.
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 05:08 PM
dell 5391 wasp13 18769-1 n94g2

by dangminhthuongld

my dell 5391 has an error that can't use the touchpad, I've loaded another bios but now my computer doesn't boot, it eats line 0.44 and then shuts down, won't boot anymore
can anyone help me with this case? I loaded the old bios but it still doesn't boot
INFO
WASP13-MB
18769-1
N94G2$LA
SVT: DT09003
CPU I5 GEN 10
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
06-11-2025, 09:19 PM
Help!, Acer Aspire A314-21(DA0ZASMB8D2 Rev. D) Flicker

by ary89

Hello, can someone help?, this Acer Aspire A314-21(DA0ZASMB8D2 Rev. D), flashing/flickering LCD when brightness set to full, sometimes it changes to green, red and white screen, I think there is problem with backlight control or LCD power, I have DA0ZASMB8D0 boardview and schematic, but not real D2(14 inch), but component look similiar, I don't have osciloscope to measure voltage ripple to lvds route, but I highly suspect it must be it, can someone enlight me?
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
06-11-2025, 07:09 PM
FX553VE-DM318T(FX553v) not POSTING

by claws77

Cpu i7-7700hq Ram - 8gb samsung, 32 gb sk hynix
Gpu - nvidia geforce 1050ti
Ssd orion o700
Hdd hgst721010A9e630

See images

What's not working right?
The system does not even POST, display is black,
LEDs on - power led, aiplane mode, capslock fpr few seconds in the start(when connected to ac power) only.

When did the problem happen?
My laptop had dual boot setup, ubuntu and windows 10.
It already had a moklist error, that would occur when i tried to boot ubuntu.
...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
05-17-2025, 04:09 PM
MacPro 5.1 330-2337-A mainboard No Powerup, PSU OK,

by wrighthm

Good Morning All. I know this has some exposure in the forum but hoped somebody could help.

I have a MacPro 5.1 that wont power on. Power Button LED never illuminates. I followed the Service Guide and removed all parts When plugging in power i get the two CPU TEMP RED led's flash once and I can press the Diag LED and get the Standby LED. If I remove Power I get the same two LED flash. I have tried shorting SYS PWR pads to force start the board and nothing happens. I have also tried shorting the SMC reset with no result. I changed the BIOS Battery too. Finally I pulled the PSU, Shorted...
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Yesterday, 09:23 PM
Acer N20C5 Laptop (Board LA-K701P) Component Identification

by sunofra78

Hi.
Is someone able to help with identifying this component? AWVDQF is written on it.
Thanks!...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 09:08 PM

Acer N20C5 Laptop (Board LA-K701P) Component Identification

by sunofra78

Hi.
Is someone able to help with identifying this component? AWVDQF is written on it.
Thanks!...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 09:08 PM
hp 32 mb unlocker

by mh123

hi please i need hp tool or canone help me to unlock bios password with hex i have many hp 840 g5-g6 with password and i dont have to unlock them
thanks
- Channel: BIOS Requests ONLY!
Yesterday, 10:56 AM
HP16 DAG3MMB3AAO REV A No power on, no led charger

by judamex

I have an HP 16 DAG3MMB3AAO REV A. The charge LED doesn't turn on.
So far, I've checked the three input MOSFETs, and all three seem to be in perfect condition. The charge IC is a BQ24781. The voltages I've checked are:
VCC: 19V
REGN: 6V
ACDET: 2.45
ACOK: 2.85

It's striking that I don't have voltages on the ACP, ACN, and CMSRC.
I'm a bit stuck on how this controller works and why it won't turn on.
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 05:08 PM
Lenovo ThinkCentre M75q Gen5 bios password

by enlot

Hello!

I'm trying to remove the bios password of an Lenovo ThinkCentre M75q Gen5
Unfortunately i cant find many resources about the Gen5 or the bios chip.

Bios chip is XMC 25RU256CXIQ.
SN is GM0QDZ77

Let me know if there is an issue with the attached bios dump, as this is my first attempt and i dont have a wson8 clip
Would be great if someone could decrypt the password from the dump, but if thats not possible i can attempt to flash the chip (hoping my crappy solder job works)...
- Channel: BIOS Requests ONLY!
Yesterday, 03:33 PM
MacPro 5.1 330-2337-A mainboard No Powerup, PSU OK,

by wrighthm

Good Morning All. I know this has some exposure in the forum but hoped somebody could help.

I have a MacPro 5.1 that wont power on. Power Button LED never illuminates. I followed the Service Guide and removed all parts When plugging in power i get the two CPU TEMP RED led's flash once and I can press the Diag LED and get the Standby LED. If I remove Power I get the same two LED flash. I have tried shorting SYS PWR pads to force start the board and nothing happens. I have also tried shorting the SMC reset with no result. I changed the BIOS Battery too. Finally I pulled the PSU, Shorted...
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Yesterday, 09:23 PM
Asus Eee PC 1005PE the battery isn't charging

by samtron786

Hello everyone
Hello, the problem is that after connecting the power adapter, the power supply flashes and doesn't charge the battery. Interestingly, it's causing a short circuit. So I decided to open the notebook to check. I'm missing the circuit diagram.
Greetings
Thank you very much
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
06-10-2025, 03:09 PM
AMITSESetup Decryptor

by EineWildeStehlampe

As a lot of older firmware images use the well known, [I]incredibly secure[/I] AMI XOR key to encode the supervisor password in the firmware image, I wrote a small Python tool to automate the process of searching through the image and decrypting the key. It is far from perfect but works well enough for me to share.

The tool uses UEFIExtract to dump the entire image, naively search for a folder ending in "AMITSEDecrypt", iterate through the body.bin to find all possible hashes stored in there, decrypt them with the XOR key, remove every second byte, then convert to ASCII....
- Channel: BIOS Requests ONLY!
01-06-2022, 02:21 AM
help unlock passbios unowhy Y13G010S4EI

by minhduc18

please unlock pass bios!...
- Channel: BIOS Requests ONLY!
05-08-2021, 10:41 PM
Incorrect DMI details

by bod0007

Got a used HP Elitebook 855 G7, I noticed MPM errors, bios errors, missing SN, product N, featurebyte and so on. gave seller to fix and collect it after 2days. on receiving the PC I noticed touch-screen not working, when I checked more details, found out it has been given DMI details of HP Elitebook 845 G7, instead of HP Elitebook 855 G7. seller has refused to help further. I need help on this. difference between 845 G7 and 855 G7 is the screen and touch panel (14in vs 15.6in with touch). same bios family S77.

Thanks
- Channel: BIOS Requests ONLY!
Yesterday, 12:21 PM
FDI55 LA-J081P schematics and o boardview

by the Benninger

hi folks, requiring the schematics or the board view of this board. Initially, the PU301 was overheating, power supply enter protection mode upon reconnecting the charger. I replaced it, it doesn't overheat but it also doesn't turn on.

PD I took measurements and attached them in the circuit image, it indicates that it would be 5v and they are not being completed if I am wrong. [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3657985}[/ATTACH]...
- Channel: Schematic Requests ONLY!
Yesterday, 11:24 AM

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