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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

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: 41,965

Last Post: New Members - please post your introductions here

235

41,965

New Members - please post your introductions here

by Ivan1905

Today, 06:57 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: 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: 3,186 Posts: 32,702

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

3,186

32,702

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

by jrutla2

Today, 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

Yesterday, 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: 3,976 Posts: 44,357

Last Post: ID smd 6pin chip - GM2 for electric scooter display

3,976

44,357

ID smd 6pin chip - GM2 for electric scooter display

by Ihandyrepair

Today, 06:59 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: 6,821 Posts: 37,347

Last Post: Need Bios Intel NUC Kit NUC6CAYH Dump file

6,821

37,347

Need Bios Intel NUC Kit NUC6CAYH Dump file

by Pionex2020

Today, 06:23 PM

Sub-Forums:

BIOS & Schematic Requests! (2,685/16,315)

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: 5,448

Last Post: Fortinet 50E Slowing down internet throughput

501

5,448

Fortinet 50E Slowing down internet throughput

by mon2

Today, 07:15 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: 31,937 Posts: 304,614

Last Post: Lenovo Ideapad 1 15IGL7 NM-E791 Rev. 1.0

31,937

304,614

Lenovo Ideapad 1 15IGL7 NM-E791 Rev. 1.0

by osbln

Today, 05:21 PM

Sub-Forums:

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

Schematic Requests ONLY! (4,744/28,526)

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: 75,708

Last Post: Screwed onto the board. Thoughts?

5,323

75,708

Screwed onto the board. Thoughts?

by R_J

Today, 08:22 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: 27,454 Posts: 374,776

Last Post:

27,454

374,776

by zeroonesolution

Yesterday, 08:22 PM

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: 65,245

Last Post: 12v PSU help please.

4,183

65,245

12v PSU help please.

by stj

Today, 02:23 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: 1,668

Last Post: Canon PIXMA MG5650 dump

302

1,668

Canon PIXMA MG5650 dump

by qasim ALI

Yesterday, 01:23 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: 2,327 Posts: 27,490

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

2,327

27,490

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

by GraphicMan

Today, 02:45 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: 223 Posts: 3,909

Last Post: Eneloop/Panasonic BQ-CC63 charger - noisy PWM IC

223

3,909

Eneloop/Panasonic BQ-CC63 charger - noisy PWM IC

by redwire

05-05-2024, 10:18 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: 1,002 Posts: 10,879

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

1,002

10,879

Xbox 360E model:1538 not turning on

by lineslim

Today, 03:43 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: 1,378 Posts: 19,410

Last Post: Quecoo T12-958 soldering station - INVER error?

1,378

19,410

Quecoo T12-958 soldering station - INVER error?

by sam_sam_sam

Today, 06:56 PM

Mark Channels Read

Screwed onto the board. Thoughts?

by moheat

[U]Hardware Details - Samsung LC24FG70FQWXXL (C24FG70) Monitor with the board model (BN91-18169A) perhaps aka (BN41-02548A)[/U]

While wall mounting, I mistakenly picked a screw 0.5cm too big than the clearance and damaged the trace and one of the part (a capacitor, I think) on the board. Images attached.

Is this repairable or will I just have to get the entire board replaced? Please guide about this.[U]Hardware Details - Samsung LC24FG70FQWXXL (C24FG70) Monitor with the board model (BN91-18169A) perhaps aka (BN41-02548A)[/U]

While wall mounting, I mistakenly

3 Photos
- Channel: Troubleshooting Computer Displays
Today, 06:40 AM
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!
Today, 10:53 AM
Bios password for asus F15- tuf 506H

by Aleixpaolo

Hello, please, could someone help me with my password problem with an asus F15- tuf 506H?

serial number : R1NRCX06Z23205A
full model machine : TUF506HC-HN088
board number : DAONJJMBAGO rev.G

Thanks in advance
- Channel: BIOS Requests ONLY!
Today, 08:02 PM
need HELP bios Asus GX531GM

by epoy

Heres the old files (not sure if original)...
- Channel: BIOS Requests ONLY!
Today, 04:04 AM
hp elitebook 835 G10 Bios

by appie1206

Hello there friends

Can someone Clear this bios file for me ?
serialnumber: 5CG33778XV
productid: 709Z1AV

Thanks in advance...
- Channel: BIOS Requests ONLY!
Yesterday, 05:03 AM
Fortinet 50E Slowing down internet throughput

by mon2

Hello. Coming to you from the laptop forum. Have a client with the Fortinet 50E that has 320 Mbps as internet input speed but only 20 Mbps output on each and every downstream port (using FAST.COM to benchmark).

Reseller is stating the Fortinet is 'worn out' which does not sound logical at all unless the flash memory is 'worn out'. They, of course, want to sell another + onsite installation fees.

Can anyone share feedback on this unit? What can cause this sluggish behavior. From our knowledge, this device is snooping on the traffic to halt viruses / hack attacks, etc....
- Channel: Troubleshooting & Designing Networks
04-24-2024, 12:51 PM
ID smd 6pin chip - GM2 for electric scooter display

by Ihandyrepair

Hi

working on a not turning on Wheelspeed WS1 scooter.
diagnosed - issue is the display/power button

on the board, with the multimeter I noticed there is a short to ground. as the red wire has 0 ohm to ground.
with infrared camera, this chip (photo circled) would heat up if I push power button on.
but I can't find any replacement or online info of this chip.
on the chip you can see it has a label GM2H, I have another good working display with the same chip but it has label GM2C

could anyone help me id this chip and guide me to...
- Channel: General Electronics Technical Discussion
Today, 06:59 PM
Quecoo T12-958 soldering station - INVER error?

by spleenharvester

I bought a T12-958 recently with an M8 handle and until now it has worked very well. The tip wasn't earthed but that was easily resolved.

Now, whenever it is switched on, it heats up to about 70*C then shows an [INVER] error on the screen and stops. In order to fix it I have to either unplug and re-plug the handle, or unplug and re-insert the tip from the handle. While doing that it changes to [ERROR], then it finishes heating up and works perfectly. Until it's turned off, after which it will show [INVER] again next time it is turned on.

Any idea what the problem is?
- Channel: Equipment Usage, Soldering, Techniques, and Reviews
05-06-2024, 01:36 PM
Macbook Pro 14 2021 - A2442 - 820-02098-A - Internal display not turning on but MacOS working good

by modtool

Dear collegues,
the owner of this machine brought it to me saying that suddenly one day the display didn't turn on anymore, he tought that all the machine was damaged but it turned out that the MacOS starts good and stays on, and that connecting it to an external display it works without problems.
If you take a look into general settings, you can also see that the internal retina display is recognized as connected by the main board but for an unknown reason it doesn't turn it on.
I've tried to put a bright light towards the screen but I can't see anything, any shadows or apple...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 05:50 AM
Dead LA-H323P (no light) - HP 15-DW

by Patan

Need help here...
I'm new on the forum and I'm not professional in electronics so i ask sorry in advance for eventual errors...
As title says, i have a LA-H323P dead.

Now, little background.
The computer was working fine, just seems that the cable of screen was dying because it had the classic color problem, sometimes green, sometimes violet, sometimes perfect, but anyway working.
When i opened it the battery was so fat that was seriously near to explode.
So i removed the battery... and turned on the notebook... that was, again, working perfectly fine....

11 Photos
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
04-28-2024, 03:31 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
Today, 01:30 PM
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
Today, 07:09 AM
Bios password for asus F15- tuf 506H

by Aleixpaolo

Hello, please, could someone help me with my password problem with an asus F15- tuf 506H?

serial number : R1NRCX06Z23205A
full model machine : TUF506HC-HN088
board number : DAONJJMBAGO rev.G

Thanks in advance
- Channel: BIOS Requests ONLY!
Today, 08:02 PM
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
Yesterday, 04:34 PM
ID smd 6pin chip - GM2 for electric scooter display

by Ihandyrepair

Hi

working on a not turning on Wheelspeed WS1 scooter.
diagnosed - issue is the display/power button

on the board, with the multimeter I noticed there is a short to ground. as the red wire has 0 ohm to ground.
with infrared camera, this chip (photo circled) would heat up if I push power button on.
but I can't find any replacement or online info of this chip.
on the chip you can see it has a label GM2H, I have another good working display with the same chip but it has label GM2C

could anyone help me id this chip and guide me to...
- Channel: General Electronics Technical Discussion
Today, 06:59 PM
please help friend's thinkpad T480 NM-b501 dead, VSYS_OUT 9.2v, thank you

by fredyjbi

Please help sir, this board does not turn on because VSYS_OUT is 9.2v, I compared it with a normal board VSYS_OUT is 10.2v, I have replaced the PQ101 and PQ102 mosfet and BQ 25700 which is known to be good, but the results are still the same, thank you

VSYS_OUT 9.2v
Meter in resistance mode auto range 6M ohm ok

NORMAL BOARD VSYS_OUT 10.2V

PQ101
PIN 2 20V
PIN 7 0.004V
PIN 6 6V
PIN 5678 0V

PQ102
PIN 567 0V
PIN 9 0.004V
PIN 234 9.2V (VSYS_OUT)

PU101 BQ25700ARSNR
1 VBUS 20V...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
05-06-2024, 10:48 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
Today, 10:52 AM
Macbook Air A2337 820-02016-07 No sound problem

by computeka

How about everyone, I have a MacBook Air which did not turn on, it had a lot of corrosion on the card where the sound plug and the fingerprint go, I have replaced it and the device now turns on but has no sound, if I connect a headphone through the plug, yes There is sound but the external speakers do not sound....

1 Photo
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
Today, 10:26 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
macbook a1707 820-00928

by PITERPENY

there is no reaction, it hangs at 20 V/0A. There was a little corrosion in the u7650 area. Replacing the u7000 did not help. Tell me, what else could it be? PPBUS_G3H=12.9V
Flashing the bios with a clean region also did not work!
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
05-06-2024, 04:31 PM

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