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Badcaps Capacitor & Electronics Repair Forum

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Topics: 45 Posts: 733

Last Post: What's the ideal operating temp for capacitors?

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What's the ideal operating temp for capacitors?

by Thermaltake

04-16-2024, 04:04 AM

Announcements & Related News

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

Topics: 233 Posts: 43,537

Last Post: New Members - please post your introductions here

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43,537

New Members - please post your introductions here

by djdhusy

Yesterday, 09:57 PM

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: 4 Posts: 10

Last Post: IT8516E need datasheet

IT8516E need datasheet

by kasun nirosh

07-22-2024, 11:00 AM

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: 3,206 Posts: 32,841

Last Post: 0.00 ESR reading on a capacitor

3,206

32,841

0.00 ESR reading on a capacitor

by stj

Today, 01:49 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: 4,523 Posts: 75,021

Last Post: Schematics tutorial

4,523

75,021

Schematics tutorial

by stj

Today, 01:43 AM

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: 4,028 Posts: 44,866

Last Post: ULN2003 IC replacement

4,028

44,866

ULN2003 IC replacement

by Askic

Today, 12:22 AM

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: 7,033 Posts: 38,659

Last Post: need clean bios for imac A1418

7,033

38,659

need clean bios for imac A1418

by madjid911

Today, 04:15 AM

Sub-Forums:

BIOS & Schematic Requests! (2,813/17,239)

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: 507 Posts: 5,497

Last Post: Ubiquiti firmware help. US-8-150W POE

507

5,497

Ubiquiti firmware help. US-8-150W POE

by gurj1979

07-24-2024, 02:26 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: 32,944 Posts: 317,801

Last Post: Dell G15 5511 (GDL58 LA-K455P)

32,944

317,801

Dell G15 5511 (GDL58 LA-K455P)

by daro19862

Yesterday, 05:42 AM

Sub-Forums:

BIOS Requests ONLY! (13,121/162,211)

Schematic Requests ONLY! (4,941/29,498)

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: 5,343 Posts: 75,821

Last Post: AOC Monitor Model C27G2

5,343

75,821

AOC Monitor Model C27G2

by Farvald

07-25-2024, 01:07 PM

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: 27,588 Posts: 376,239

Last Post: Vizio E701i-A3 Vizio logo flashing then turns off

27,588

376,239

Vizio E701i-A3 Vizio logo flashing then turns off

by Super360

Yesterday, 09:23 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: 4,214 Posts: 65,539

Last Post: APC Smart UPS SUA1500 does not detect AC / doesn't turn on

4,214

65,539

APC Smart UPS SUA1500 does not detect AC / doesn't turn on

by redwire

Yesterday, 11:32 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: 309 Posts: 1,698

Last Post: canon TS207

309

1,698

canon TS207

by eulah

07-25-2024, 06:43 AM

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: 2,365 Posts: 27,715

Last Post: California Electronics pro-8800a digital amplifier stereo

2,365

27,715

California Electronics pro-8800a digital amplifier stereo

by labello

Yesterday, 10:10 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: 241 Posts: 4,132

Last Post: Blomberg DV17600W laundry dryer MCU firmware needed. Please help!

241

4,132

Blomberg DV17600W laundry dryer MCU firmware needed. Please help!

by redwire

Yesterday, 01:08 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: 1,042 Posts: 11,187

Last Post: monowheel repair,Is the diode the problem?

1,042

11,187

monowheel repair,Is the diode the problem?

by petehall347

Yesterday, 05:23 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: 1,391 Posts: 19,593

Last Post: Owon HDS2202S oscilloscope

1,391

19,593

Owon HDS2202S oscilloscope

by R_J

07-25-2024, 06:55 PM

Mark Channels Read

Sharp Aquos LC-40UG7252E LCD TV burn in?

by jonah1024

Hello!

I'm a few days old into this TV screens repair universe so please bear with me.

Recently, and all of a sudden my 40” 4K Sharp Aquos LCD TV turned on with colors all smudged in some places on the screen that remain like that even without any kind of video source. I do have image but the colors are smudged/tinted/ washed out in patches as per defects. This to me looks similar to burn in but I’m shore this is not an OLED.

- I did the classic unplug and hold power button to discharge the caps but it didn't help.
- I did a factory reset as well...

5 Photos
- Channel: Troubleshooting TVs and Video Sources
07-16-2024, 04:23 AM
asus tuf f17 tuf706hm hx105

by aderreda

Hello, I need the BIOS for the asus tuf f17 tuf706hm hx105
SN: N2NRCX10W68208C
CN: YSWM 24M
MFD: 2022-02
- Channel: BIOS Requests ONLY!
Yesterday, 06:45 PM
HP Victus 15-fbfb0003na Mobo DAG3PMB38A0 REV:A

by pete_the_geek

Afternoon people, wondering if anyone can help with this motherboard, liquid damage, coke
Looking at pictures there's an area of damage where two resistors are now missing. Obv no schematics available but could anyone measure them for me, similar boards with different CPU/GPU possibly have
the same configuration around this chip (RT6338 marked RV=9J) last pic isn't of my board but shows the two resistors in the green circle, according to datasheet they feed a ENB/MODE pin on the IC and mode is set by different voltages hence this potential divider?
Any help greatly appr...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
07-23-2024, 05:22 AM
Checking bios with oscilloscope

by RedLap7

Hi. My laptop has no display. My motherboard is HP LA-D707P. All voltages are ok .I checked the bios pins with a oscilloscope but see no clock signals .but see only 3.3V . I did flashed the bios 2 times.even used new chip.

Now please educate me which direction I must go. ?

[URL=filedata/fetch?id=3317202&d=1722066687][ATTACH=JSON]{"alt":"Click image for larger version Name:\tScreenshot_20240727-103912_Microsoft 365 (Office).jpg Views:\t0 Size:\t328.5 KB ID:\t3317202","data-align":"none","data-attachmentid":"3317202","data-size":"medium"}[/ATTACH][/URL]...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 01:53 AM
0.00 ESR reading on a capacitor

by Fuzzy Fix

Howdy all I have a 90uF Capacitor 200/275 VRMS and measured the ESR . Reading says 00.3 Ohms and about 1/2 a second later 00,0 and says low ESR (Really No Kidding).
I have checked it on the multimeter and reading is 94.7uF well within soec as ir has a 25% tolerance on it.
Can anyone advise me is this capacitor likely to fail in the near future or still good to use.

1 Photo
- Channel: General Capacitor Questions & Issues
Yesterday, 12:05 AM
Schematics tutorial

by rictechie

I'm a newbie trying to learn to repair. Now I'm learning to use schematics and based on the image I have a short on that smd capacitors and I will try to voltage inject so I can find the short. I'll just verify if I will put the positive probe on the one I encircled? Thanks in advanced...
- Channel: General Computer & Tech Discussion
Today, 12:59 AM
Foreign language OCR?

by Hondaman

I'm good at starting projects but never really completing them. So I think I'll start another one. Back in April 2024, a book was published, for the first time, in English ("Passcode to the Third Floor Secretariat"). So I don't need to use OCR and online translation portals for that one. But another book, "Fully Controlled Areas", ISBN 978-89-90959-28-7, has not been translated to English and probably never will be. (And I have got the only copy I will ever have, trust me). Lots of crude, hand-drawn illustrations of people starving and getting executed in North Korea. The...
- Channel: General Computer & Tech Discussion
07-17-2024, 05:11 AM
Lenovo ThinkBook 15 G4 IAP schematic and/or board view

by think765

Hi all,

Does anyone have a copy of the Lenovo ThinkBook 15 G4 IAP schematic and/or board view? I would be forever grateful!

B
- Channel: Schematic Requests ONLY!
07-24-2024, 10:36 PM
ULN2003 IC replacement

by Askic

Hello, on a step motor driver board,
I have found damaged ULN2003 manufactured by ST as package SOP 16 (narrow). Now I have possibility to order get delivered very fast the following mark: ULN2003AFWG,
I'm not really sure if this is equivalent IC.
On the original I can (hardly) read the following data: G001284, and on this replacement IC there is also this: [B]024826[/B]

So, are these two ICs equivalent or not? First one is made by ST and second one by Toshiba. Based on the available manuals and schematics it should be 100% match.
What I need to pay attention...
- Channel: General Electronics Technical Discussion
Yesterday, 05:28 AM
APC Smart UPS SUA1500 does not detect AC / doesn't turn on

by CapLeaker

Sooo... I have an interesting victim today. Our special on the menu is a APC Smart UPS SUA1500. Looks like it's got Alzheimer or isn't smart anymore (dead, dumb as f@ck), but at the same time it isn't.
Battery is about a year old and they are good at a resting voltage of 26.5VDC. If I press the on button for 3 seconds it does turn the inverter on and I get 120VAC no problem at the back and the battery shows full. So it isn't the battery. It also charges the battery no problem when plugged in add that as a twist!
However if I plug it in with the battery attached it won't...
- Channel: Troubleshooting Power Supplies and Power Supply Design
Yesterday, 02:48 PM

Vizio E701i-A3 Vizio logo flashing then turns off

by Super360

Ok so here's the story. I was watching tv one day when all of a sudden I heard a pop from the back of the tv set and rushed to unplug the set. By this time the tv already had smoke coming out the back. It was not storming or inclement weather that day to cause a power surge to the best of my abilities. When I opened the tv up, I found that the three capacitors on the psu (highlighted in red) were all bulging and looked they had exploded. I replaced all of them right away and when I went to start up the tv after the "fix" it started just showing the flashing vizio logo as soon as power...
- Channel: Troubleshooting TVs and Video Sources
07-25-2024, 07:06 PM
Schematics tutorial

by rictechie

I'm a newbie trying to learn to repair. Now I'm learning to use schematics and based on the image I have a short on that smd capacitors and I will try to voltage inject so I can find the short. I'll just verify if I will put the positive probe on the one I encircled? Thanks in advanced...
- Channel: General Computer & Tech Discussion
Today, 12:59 AM
Checking bios with oscilloscope

by RedLap7

Hi. My laptop has no display. My motherboard is HP LA-D707P. All voltages are ok .I checked the bios pins with a oscilloscope but see no clock signals .but see only 3.3V . I did flashed the bios 2 times.even used new chip.

Now please educate me which direction I must go. ?

[URL=filedata/fetch?id=3317202&d=1722066687][ATTACH=JSON]{"alt":"Click image for larger version Name:\tScreenshot_20240727-103912_Microsoft 365 (Office).jpg Views:\t0 Size:\t328.5 KB ID:\t3317202","data-align":"none","data-attachmentid":"3317202","data-size":"medium"}[/ATTACH][/URL]...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 01:53 AM
Acer A515-51 - C5V01 LA-E891P Rev 1c

by coffeebreath

laptop lights wont turn on, wont power on. When plugged in I get 0.4v-0.8v directly from the DC jack plug on the motherboard. 19v from the charger.

Thank you.
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
07-23-2024, 02:30 PM
asus tuf f17 tuf706hm hx105

by aderreda

Hello, I need the BIOS for the asus tuf f17 tuf706hm hx105
SN: N2NRCX10W68208C
CN: YSWM 24M
MFD: 2022-02
- Channel: BIOS Requests ONLY!
Yesterday, 06:45 PM
APC Smart UPS SUA1500 does not detect AC / doesn't turn on

by CapLeaker

Sooo... I have an interesting victim today. Our special on the menu is a APC Smart UPS SUA1500. Looks like it's got Alzheimer or isn't smart anymore (dead, dumb as f@ck), but at the same time it isn't.
Battery is about a year old and they are good at a resting voltage of 26.5VDC. If I press the on button for 3 seconds it does turn the inverter on and I get 120VAC no problem at the back and the battery shows full. So it isn't the battery. It also charges the battery no problem when plugged in add that as a twist!
However if I plug it in with the battery attached it won't...
- Channel: Troubleshooting Power Supplies and Power Supply Design
Yesterday, 02:48 PM
monowheel repair,Is the diode the problem?

by NicRac

Hello everybody☺️ I am glad to be here and looking forward to a good discussion.

First of all, I am new here. Therefore I will shortly introduce myself.
I am Nico and currently I study Physics.
In my freetime I like to build and repair stuff. Especially big battery's.

A few years ago I got myself an electric unicycle, monowheel or however you call that.
The battery bms was broken so I replaced and resolder that. Nothing big.
I used this thing for some years and had a lot of fun. Unfortunately I used it last time in heavy rain. Usually everything...

5 Photos
- Channel: Troubleshooting Game Consoles & Other Weird Devices
Yesterday, 06:13 AM
A2442 - No sound over internal speakers and no video playback

by soeren

I am facing a strange issue, I don't have any sound over my internal MacBook speakers and also the video won't start. If I change to my head speaker or via HDMI (speaker on my external Display) the sound works over the head speaker or Display and also the video starts (ex. youtube).

All happened after the battery ran out of power overall several days when I was on vacation.

I tried to remove the battery and then reconnected the battery, and then the MacBook Pro 14 2021 won't accept any power from my power socket. Then I removed one speaker, connected again the battery...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 01:24 AM
Microsoft Surface Pro 4 1724 no power

by johnbeton

Hello,

This tablet has no power, no visual signs of corrosion or burned components.
I notice V_ALWAY_ON_IN on PD5501 and PD5506 is 12V.
But VDD_BATA_PACK on PD5501 is 2.05V when the charger is plugged in, after a little over 1 minute VDD_BATA_PACK goes up to 6.16V
FANG_PWR_F stays 0V.
+3P3VSB_REG is only 1.98V
+5VSB_REG is 0V

I cannot find shorted coils or coils with low resistance to ground except for the ones close to the PCH/CPU.

Link to boardview and schematics:
[url]https://www.badcaps.net/forum/troubleshooting-ha...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
07-24-2024, 01:48 PM
0.00 ESR reading on a capacitor

by Fuzzy Fix

Howdy all I have a 90uF Capacitor 200/275 VRMS and measured the ESR . Reading says 00.3 Ohms and about 1/2 a second later 00,0 and says low ESR (Really No Kidding).
I have checked it on the multimeter and reading is 94.7uF well within soec as ir has a 25% tolerance on it.
Can anyone advise me is this capacitor likely to fail in the near future or still good to use.

1 Photo
- Channel: General Capacitor Questions & Issues
Yesterday, 12:05 AM

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