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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?

733

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: 235 Posts: 41,980

Last Post: New Members - please post your introductions here

235

41,980

New Members - please post your introductions here

by ea91860

Today, 11:33 AM

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: 4

Last Post: ncp81208 datasheet

ncp81208 datasheet

by BAKEEL1990

05-01-2024, 05:24 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: 3,187 Posts: 32,703

Last Post: Help Identifying a Tantalum Capactior!!!!! 68 C79 Please help!!

3,187

32,703

Help Identifying a Tantalum Capactior!!!!! 68 C79 Please help!!

by jrutla2

Yesterday, 10:08 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: 4,498 Posts: 74,847

Last Post: To fix laptop screen vertical line by working on its EDP cable

4,498

74,847

To fix laptop screen vertical line by working on its EDP cable

by Diah

05-07-2024, 03:31 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: 3,977 Posts: 44,361

Last Post: Identifying component Flyback? DC-DC?

3,977

44,361

Identifying component Flyback? DC-DC?

by truclacicr

Today, 11:52 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: 6,823 Posts: 37,359

Last Post: EVGA RTX 2070 Super Black with u610 blown up

6,823

37,359

EVGA RTX 2070 Super Black with u610 blown up

by ReparaPC

Today, 10:55 AM

Sub-Forums:

BIOS & Schematic Requests! (2,688/16,326)

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: 501 Posts: 5,450

Last Post: Fortinet 50E Slowing down internet throughput

501

5,450

Fortinet 50E Slowing down internet throughput

by CapLeaker

Today, 05:23 AM

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: 31,946 Posts: 304,873

Last Post: LA-E801P Schematic

31,946

304,873

LA-E801P Schematic

by omar3311

Today, 11:48 AM

Sub-Forums:

BIOS Requests ONLY! (12,732/153,548)

Schematic Requests ONLY! (4,745/28,531)

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: 5,323 Posts: 75,711

Last Post: Screwed onto the board. Thoughts?

5,323

75,711

Screwed onto the board. Thoughts?

by valvashon

Today, 09:49 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: 27,457 Posts: 374,828

Last Post: Sony LED 65X9005A shuts down after few seconds - looking for help

27,457

374,828

Sony LED 65X9005A shuts down after few seconds - looking for help

by tec3000

Today, 11:12 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: 4,183 Posts: 65,246

Last Post: ASUS ROG THOR 1200W PLATINUM PSU

4,183

65,246

ASUS ROG THOR 1200W PLATINUM PSU

by sam_sam_sam

Today, 07:04 AM

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: 302 Posts: 1,669

Last Post: Pantum P2502W Toner Reset Chip help

302

1,669

Pantum P2502W Toner Reset Chip help

by Mahafoug Mony

Today, 05:55 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: 2,327 Posts: 27,492

Last Post: Pioneer amplifier A-205 Relay not clicking after a mistake i made

2,327

27,492

Pioneer amplifier A-205 Relay not clicking after a mistake i made

by GraphicMan

Today, 06:20 AM

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: 224 Posts: 3,910

Last Post: 9V relay temperature 40C

224

3,910

9V relay temperature 40C

by jm1234

Today, 03:03 AM

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: 1,002 Posts: 10,880

Last Post: Xbox 360E model:1538 not turning on

1,002

10,880

Xbox 360E model:1538 not turning on

by lotas

Today, 09:54 AM

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: 1,379 Posts: 19,413

Last Post: Making a Handskit hot air station a bit less stupid

1,379

19,413

Making a Handskit hot air station a bit less stupid

by spleenharvester

Today, 09:09 AM

Mark Channels Read

macbook A1932 820-01521-A

by PITERPENY

Hi all ! I really need help with my motherboard! consumption 20V / 0.060-0.280 A is unstable! not detected in DFU! There is no picture on either the external or internal monitor!
PPBUS_G3H=12,61v
PPBUS_HS_CPU=12.61v
PPDCIN_G3H=19.94v
PP5V_G3S=5.12v
PP5V_S5_LDO=5.12v
PP3V3_G3H_RTC=3.3v
PP3V3_G3H=3.3v
PP3V3_G3SSW_SNS=[B][COLOR=#c0392b]2.3-2.6v[/COLOR][/B] is unstable!
PP3V3_G3S=3.3v
PP3V3_TBT_X_S0=[B][COLOR=#d35400]0v[/COLOR][/B]
PP2V7_NAND=2.513v
PP1V8_G3S=1.8v
PPVCC_S0_CPU=[B][COLOR=#d35400]0v
[/COLOR][/B...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 11:56 AM
Thinkpad L13 Gen 1 Password

by digtalhd

Any help with
Lenovo ThinkPad L13 Gen 1
Serial: R9117ESC
EC: 256KB
Plz remove password.
Thank you....
- Channel: BIOS Requests ONLY!
Today, 11:53 AM
Identifying component Flyback? DC-DC?

by unimatrix93

Can I ask you guys help me identify this godforsaken component?

I'm tearing my hair out finding this component.

The board is from an egg incubator.
i got it with a "popped cap" while there are many damaged components on it, which got succesfully identified with one exception:
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3267072}[/ATTACH]
And here is the board where it came from (U1/1):
[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3267073}[/ATTACH]...
- Channel: General Electronics Technical Discussion
Yesterday, 08:21 AM
Help reading schematic voltages input/output

by gjgib

Hello, this might be embarassing since I consider it a dumb question but keeps me kinda stuck sometimes in my journey.

I want to know if there is any post in this forum which explains my questions. [B]A)[/B] [B]When, where and how do I know when X voltage line is input or output. Example: [/B]

[URL=filedata/fetch?id=3266119&d=1715040463][ATTACH=JSON]{"alt":"Click image for larger version Name:\timage.png Views:\t0 Size:\t151.9 KB ID:\t3266119","data-align":"none","data-attachmentid":"3266119","data-size":"thumb"}[/ATTACH][/URL]...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
05-06-2024, 08:11 PM
Latitude 3580 computrace

by dfresh1

I would very much like to get a Latitude 3580 bios cleaned. Specifically the computrace reset to disabled.

Can't find anywhere on here for a Latitude 3580 except under this forum.

Model: Latitude 3580
ST: 4VH77F2
dfresh1...
- Channel: BIOS Requests ONLY!
Yesterday, 10:53 AM
ASUS GA401QM No ACDRV, No CMSRC

by ResoluteHawk

I have an Asus G14 (GA401QM) that has a power issue. Originally the board had a shorted 5V rail and dead EC. I reballed a working EC, soldered it on, and I resolved the 5V issue by replacing the APL6012 and the low side 5V mosfet. Resistances on all power rails are healthy now, but 20V does not make it through the first MOSFET. 20V is present on the drain of the first MOSFET, but there is no voltage on the gate or source.

When diagnosing this issue, I thought that the issue was due to the BQ24800 chip not outputting the correct signals so I soldered on a known working chip and the...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 01:30 PM
does anybody have Schematic and board view Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot,

by roshon

does anybody have Schematic and board view [B]Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot, [/B]does anybody have Schematic and board view [B]Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot, [/B]
- Channel: Schematic Requests ONLY!
Today, 10:06 AM
M1 A2338 screen and touchbar issues after cleaning up liquid damage

by jkruns

Hello everyone,

This is my first post after browsing this wonderful treasure trove of knowledge for many, many evenings. I've decided to learn how to fix these things, properly.

My patient is an A2338 Macbook Pro M1 (late 2020).

It had some corrosion around JT710 and JT700 caused by liquid spill, as well as against the protective barrier around the USB-C chips UF000 and UF100. So I took the main board out and cleaned it with a toothbrush and alcohol, then with alcohol in an ultrasonic cleaner. Cleaned the touchbar flex connectors as well. The board looks...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
04-22-2024, 06:45 AM
JVC lt-32hg35e (Vestel) blinking LED

by unimatrix93

Dear forum,

I'm stuck with this old TV unit.
PSU: 17PW04-1
MB: 17MB62-1
Symptoms:
- Blue LED constantly blinking when connected to AC.
- Only sigh of life is beeping when touching the capactive buttons on the front.

Diagnostics so far:
Checked the PSU output voltages:
12V present
5V present altought its only around 4.2V
3V is present measured 3.4V.

I check TP 202 which is for the short circuit protection: 0.606V on diode mode

Since I met with some vestel models before with similiar symptoms...
- Channel: Troubleshooting TVs and Video Sources
05-03-2024, 03:18 AM
EVGA RTX 2070 Super Black with u610 blown up

by ReparaPC

I have an RTX 2070 Super from evga with a blown up IC. With the IC on the card, pin 17 had a short to ground. This pin is connected to the 5V rail by R993, a 0hm resistor. I removed both U610 and R993, to discover that the 5V rail has 800 Ohms of resistance to ground. After checking some resources online, i found a picture which describes the usual measurements a Turing series GPU should have in order to "work properlly". Interestingly enough, this gpu doesn't have U31, the IC responsible for the creation of the 5V on the card, as well as no L47.

Are these 800 ohms rigth...

https://repair.wiki/w/RTX_2070#/media/File:Example_measurement_pictures.jpg

https://repair.wiki
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
Yesterday, 03:10 PM

ASUS GA401QM No ACDRV, No CMSRC

by ResoluteHawk

I have an Asus G14 (GA401QM) that has a power issue. Originally the board had a shorted 5V rail and dead EC. I reballed a working EC, soldered it on, and I resolved the 5V issue by replacing the APL6012 and the low side 5V mosfet. Resistances on all power rails are healthy now, but 20V does not make it through the first MOSFET. 20V is present on the drain of the first MOSFET, but there is no voltage on the gate or source.

When diagnosing this issue, I thought that the issue was due to the BQ24800 chip not outputting the correct signals so I soldered on a known working chip and the...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 01:30 PM
does anybody have Schematic and board view Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot,

by roshon

does anybody have Schematic and board view [B]Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot, [/B]does anybody have Schematic and board view [B]Mac Mini 2018 model A1993 MLB 820-00939-A - does not boot, [/B]
- Channel: Schematic Requests ONLY!
Today, 10:06 AM
HP Gaming 16-a0006nl - no charge / no power

by ShocK-306HDi

Hi friend, I've this notebook HP Gaming 16-a0006nl with QUANTA DAG3JBMB8D0 that won't power on.
I start checking first mosfet and they seems to be ok.
On power button I get 3 that go to 0 on pressing, and come to 3v on release.
After I check charge ic that is BQ738H
I write here measure with battery and ac

19
19
19
25
3

1.9
0
3.1
3.1
1

11
11
11
gnd
0

6
10
11
11
19

I've 0 on pin 7 IOUT and on pin 15 LODRV.
...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 07:09 AM
ASUS ROG STRIX GL702VSK no power issue PQ8901, PQ8900?

by ub6ib969

Hi,

working on a ASUS ROG STRIX GL702VSK 60NB0DZ0-MB1260 that does not power on. At the PQ8900 PIN2 (P_CHG_ACMOS_G_20) I am receiving 24.7V and PIN1 (P_CHG_ACMOS_S_20) 20V, however when I place the PQ8901 P_CHG_ACMOS_G_20 it drops 0V. I don't have the replacement mosfets ( N-MOSFET QM3058M6AC PRPAK5*6
UBIQ) however will any N-channel mosfet with similar parameters work ? I also found that PCI8703, PCI8701 are shorted. any help would be grateful.
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
05-07-2024, 04:34 PM
QqEEH - Lenovo NM-D522

by bociub

Hi There

So I am looking for a part. Namely, a QqEEH. I beleive this is responsible to create the 3.3 power rail, but on my motherboard it is shorted to the ground. injecting 1 volt into the 20 volt power rail the IC heats up. Around the IC almost everything is shorted to the ground,
Anyone knows what this little controller chip supposed to be?

Thanks,...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 07:47 AM
Dell Inspiron 5415 Bios Required

by Ado02

Hi,

I'm currently experiencing issues with my Dell Inspiron 5415. Initially, the laptop would sometimes fail to boot, with the keyboard backlight turning on but no display on the screen. After repeated attempts to power it on and off, it would eventually boot up and function normally.

To troubleshoot, I removed both the main battery and the BIOS battery, but now the laptop exhibits a different issue: the fan runs at full speed, but the screen remains blank, and it doesn't boot up.

I suspect there might be a problem with the BIOS, and I would like assistance...
- Channel: BIOS Requests ONLY!
Today, 05:13 AM
Lenovo Legion Y540-15IRH, PQ201?

by mist79

I am still new to this, so I might sound brainless/ignorant in parts of my description/questions, since I have a lot of gaps in my knowledge, but I will do my best.

The laptop is Lenovo Legion Y540-15IRH, and the motherboard model is NM-C221 Rev 2.0 (Schematics and BoardView can be easily found). To save time I have the exact problem in the laptop as the one shown in this video:
[url]https://www.youtube.com/watch?v=tfucZ_WKpz4[/url]

I was checking the voltages I found that the main power rail V20B+ is good, and same for the +3VALW circut, but when I tried the +5VALW,...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Yesterday, 10:52 AM
JVC lt-32hg35e (Vestel) blinking LED

by unimatrix93

Dear forum,

I'm stuck with this old TV unit.
PSU: 17PW04-1
MB: 17MB62-1
Symptoms:
- Blue LED constantly blinking when connected to AC.
- Only sigh of life is beeping when touching the capactive buttons on the front.

Diagnostics so far:
Checked the PSU output voltages:
12V present
5V present altought its only around 4.2V
3V is present measured 3.4V.

I check TP 202 which is for the short circuit protection: 0.606V on diode mode

Since I met with some vestel models before with similiar symptoms...
- Channel: Troubleshooting TVs and Video Sources
05-03-2024, 03:18 AM
Making a Handskit hot air station a bit less stupid

by spleenharvester

I bought one of [URL="https://www.aliexpress.com/item/1005002890887241.html"]these [/URL]as it was the only one I could find that is compact enough to fit in my toolbox (though I've since found [URL="https://www.aliexpress.com/item/32844169715.html"]KSGER make a substantially safer looking one[/URL]). It's one of those fan-in-handle things that has the 230V element in the handle. Quecoo briefly sold a [URL="https://www.aliexpress.com/item/1005004884759470.html"]similar unit [/URL]but discontinued it.. maybe they couldn't find solutions to these problems. I'm aware...
- Channel: Equipment Usage, Soldering, Techniques, and Reviews
Today, 09:09 AM
Pioneer amplifier A-205 Relay not clicking after a mistake i made

by GraphicMan

Hello guys
Because the unit is old (but only occasionally used) the loudness button causes some noise due to bad contact,
sprays did not work, so i decided to solder the pins that it connects on the pcb at the on (loudness on) position
i did that and it worked fine, i know from the bottom of my heart that the switch connects 2 pins and also d/c other 2 pins
on every position it have (6 pin switch), so i was curious what would happen if i clicked the switch off while the pins are soldered at on (so basiclly on and off at the same time), when i did so the sound is gone, nothing...
- Channel: Troubleshooting Audio Equipment
05-05-2024, 06:20 AM

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