[FONT=Calibri]I have a Samsung power board BN 44–00 874C that is dead. I have looked for a schematic but no such luck. I opened it up and found two Mosfets burnt QP801CS and QP802CS, also the main fuse. I replaced them and checked the two blue capacitors in front of them. They both tested good. I checked the Diode on the same heat sink and the two capacitors in front and they checked out OK. I plugged it in again and that blew the fuse and the Mosfets the second time. I plugging it in again hooked to a 100 W watt light bulb. The light bulb starting started...
Announcement
Collapse
No announcement yet.
Badcaps Electronics Repair Forum & Schematic Search
Collapse
Collapse
Please log in to your account to view your subscribed posts.
Directory | Topics | Posts | Last Post | |||
---|---|---|---|---|---|---|
Badcaps Capacitor & Electronics Repair Forum | ||||||
Frequently Asked Questions (No Posting)
All new members, PLEASE READ HERE FIRST! Posting only allowed by established members.
Topics: 46
Posts: 735
Last Post:
Capacitor nominal value
|
46 | 735 | ||||
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 240
Posts: 50,006
|
240 | 50,006 | ||||
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: 2,162
Posts: 2,542
|
2,162 | 2,542 | ||||
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: 60
Posts: 70
|
60 | 70 |
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: 3,252
Posts: 33,175
|
3,252 | 33,175 | ||||
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: 4,578
Posts: 75,432
|
4,578 | 75,432 | ||||
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: 4,249
Posts: 46,788
Last Post:
SOT23-5 LiFePO4 protection IC? 13D1S?
|
4,249 | 46,788 | ||||
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: 7,816
Posts: 44,048
Last Post:
hp z4 g4 bios
|
7,816 | 44,048 | ||||
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: 530
Posts: 5,637
|
530 | 5,637 | ||||
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: 36,667
Posts: 373,356
Last Post:
THOMSON N14C-4BK128 bios
|
36,667 | 373,356 | ||||
Sub-Forums:
| ||||||
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: 5,430
Posts: 76,349
Last Post:
Samsung S19B300B Firmware Need
|
5,430 | 76,349 | ||||
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: 28,098
Posts: 383,800
|
28,098 | 383,800 | ||||
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: 4,324
Posts: 66,503
|
4,324 | 66,503 | ||||
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: 348
Posts: 1,846
Last Post:
Error E4 of HP Smart Tank 750 printer
|
348 | 1,846 | ||||
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: 2,503
Posts: 28,639
Last Post:
KENWOOD KA-701 POWERS ON, NO RELAY CLICK
|
2,503 | 28,639 | ||||
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: 312
Posts: 4,833
|
312 | 4,833 | ||||
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: 1,160
Posts: 11,920
|
1,160 | 11,920 | ||||
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: 1,416
Posts: 19,872
Last Post:
gddr5 ball lead?
|
1,416 | 19,872 | ||||
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
|
101,079 | 101,091 |
![]()
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: 8,718
|
8,712 | 8,718 |
by SMDFlea
04-17-2025, 08:21 AM
|
What's Going On?
Collapse
There are currently 509586 users online. 5634 members and 503952 guests.
Most users ever online was 1,342,976 at 10:51 PM on 04-26-2024.
- luiztessadri ,
- Mymft ,
- matheus_ld ,
- thekillerxp ,
- hasnahusna ,
- tktrom ,
- joseluistec ,
- Lap service quintana ,
- Hamadaq ,
- lordmmx ,
- idkzx ,
- arlyihann ,
- villagesell ,
- waleedhsaneen ,
- Ariel Añon ,
- Herlen castillo ,
- winstrufino ,
- SAMY SAMY ,
- mario36 ,
- plowskyyJ ,
- mrbroks ,
- slavichichek ,
- Fanfan Max Antonio uchiwa ,
- Huialx ,
- churumbis ,
- davidebeatrici ,
- InGarin` Scape ,
- arles1722 ,
- lerom ,
- sandroironman ,
- renmodbo ,
- lotas ,
- essaadi ,
- sudod14 ,
- rembot.msk ,
- eccerr0r ,
- Wang Tingting ,
- raisrosyidin ,
- djpaesgana ,
- Nacho Varga ,
- kjchatman ,
- LAB MM ,
- M.A.D ,
- Nungaray ,
- Frosted13 ,
- Mephysis ,
- diego lopez ,
- fredsonsilva84 ,
- kodinabeel ,
- kuba2102 ,
- Fst1 ,
- santi.med ,
- yois ,
- andrewwt ,
- osc ,
- djadam23 ,
- Abe Sherman ,
- bohaboha ,
- andrewants ,
- danidanniiii ,
- widdx ,
- Steven Guerrero ,
- zww ,
- Ivica83 ,
- diosoft ,
- s327e ,
- Halifan ,
- st_anger ,
- jinki_dadou ,
- hn8502 ,
- lkdn83 ,
- jossethalx ,
- linana ,
- Hernan Maito ,
- Bilalrasoolrumb@gmail.com ,
- Adrian Gonzalez ,
- general4lol ,
- marcelofct ,
- LEO037_2029_ ,
- jordilc ,
- petehall347 ,
- rianarianto ,
- Blade47 ,
- invente ,
- fettmann ,
- aworele30 ,
- Kira Krik ,
- gusrau86 ,
- jam1976 ,
- pinkrose ,
- abajor ,
- Diep Pham ,
- illili ,
- Salmus666 ,
- FalconPunch ,
- donal310 ,
- deadelus ,
- akça ,
- regged ,
- milek99 ,
- ylnzdm ,
- Addam Brooks ,
- MrTechGadget ,
- atilas75 ,
- discloacct ,
- Rockymeister ,
- volky70 ,
- cosmosbilisim ,
- vik2 ,
- inv4der ,
- krob80 ,
- retrooo ,
- pemar1986 ,
- tamiya2020 ,
- Undermexico ,
- ambinf ,
- 820-00165-A G944 0166_B02 ,
- Gilbertps90
Badcaps Statistics
Collapse
Topics: 220,344
Posts: 1,477,107
Members: 576,130
Active Members: 22,526
Welcome to our newest member, Fanfan Max Antonio uchiwa.
Latest Topics
Collapse
-
by Larrob19[FONT=Calibri]Hello,[/FONT]
[FONT=Calibri]I have a Samsung power board BN 44–00 874C that is dead. I have looked for a schematic but no such luck. I opened it up and found two Mosfets burnt QP801CS and QP802CS, also the main fuse. I replaced them and checked the two blue capacitors in front of them. They both tested good. I checked the Diode on the same heat sink and the two capacitors in front and they checked out OK. I plugged it in again and that blew the fuse and the Mosfets the second time. I plugging it in again hooked to a 100 W watt light bulb. The light bulb starting started...05-08-2025, 12:49 PM -
by djpaesganaHi i need help with a Dell latitude 14 5420 GDF40 LA-K491P Rev 2.0 (A01) 2020-11-16 , it charges on usb type C i checked the charger with a pd decoy and a electronic charge its ok when, i tested the usb c jack with a tail tester it reads ok [ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3637350}[/ATTACH] (photo incluided), then with a usb charge tester it looks like its trying to negotiate the PD but ressets i openned the laptop and with a thermal camera i noticed 3 ICS getting hot the TPS65994 (UT3) the ISL95860HRTZ...Yesterday, 08:12 PM
-
by krob80Hey everyone. I recently acquired a PS5 that is not turning on (no beep/power). PSU is good and there is no shorting on the 12V rail.
It came with a Gen3 SSD installed so I feel that things went down hill for the previous owner when it was installed. F7003 was blown but there was nothing shorting to ground. I replaced the fuse but still no power (new fuse is still good for now).
When connecting it to a bench power supply, it only pulls 10 mA (doesn't spike when first connected).
I noticed that there are a couple capacitors missing from the Vcore power regulator (pictures attached)....Today, 04:24 PM -
by eccerr0rI have a SOT23-5 marked
"13D1 S"
I wonder if anyone recognizes this IC? It should be a LiFePO4 protection IC, but having problems finding the datasheet, anyone recognize this?
G00gl3 returns a 6-pin LDO which is not quite right...Yesterday, 10:41 AM -
by reessiHello!
This machine had the classic fault that all these motherboards have which is the loose pins on the RAM slot.
I soldered them as I have done on a few other of these and then it posted.
Everything works, fully installed with Windows 11 etc.
Only fault is when it has gone to sleep and you turn on again the screen is blank with no backlight and the caps lock does not work so I assume it has frozen completely.
Only way to get it to post again is to remove the battery! No amount of forcing off and on will get it to post!
...05-13-2025, 05:20 PM -
by cappernicusToshiba Satellite r945-p440
Motherboard: FAM2SY2 A3256A
I do not have a schematic or board file
I usually let it go to sleep every time I use it because it is nearly always plugged in, with occasional shutdowns to reset things. Then it started to hard crash every time it tried to come out of sleep. The lights would come on for half a second but before anything shows on the screen they would all shut off and it would boot up as if I had shut it down completely (except that windows knows it didn't), and when it comes back on the fan ramps up to full and stays there perpetually...04-16-2025, 05:31 PM -
by dbuergiHi all,
I got a 16inch MacBook Pro showing 5v and 0,3a on the left ports and right side has one power cycling and one showing nothing. The one cycling shows 30c under thermal camera. Surrounding components show no corrosion or any shorts.
Any ideas what to check next? The whole board looks clean compared to the other A2141s i saw....04-25-2025, 11:40 AM -
I bought 5 of these chargers as parts/not working from the same seller. Upon receipt all were dead and had blown or missing 3A fuses. Upon connecting to mains I find there is +330VDC across the filter cap and nothing past that point.
TOP268EG is visibly scorched on all 5 units, with the scorch mark being between drain and source pins. Is this a common fault or have these chargers all been killed simultaneously by a power surge?
Any ideas what else might be damaged? I am in the process of tracing a schematic for these parts05-07-2025, 09:35 AM -
by wolf1976hi to all i want to ask if its possible tell me your opinion if acoording with the video is display problem ?
thanks on advance...Today, 02:35 PM -
Hello everyone,
I'm having a hard time dumping the BIOS of a [B]Lenovo Ideapad Duet 3 (11IAN8)[/B]. The chip is a [B]Winbond W25R256JVEN[/B], directly soldered to the board in a [B]WSON8 package[/B].
Since there are lots of tiny components near the chip, I was hesitant to desolder it using hot air. Instead, I soldered thin wires directly to the chip's pads and connected them to a [B]CH341A programmer[/B] (photos attached).
The chip is detected correctly in both [B]NeoProgrammer[/B] and [B]ASProgrammer[/B], but I'm unable to get a consistent dump. I've tried...2 PhotosToday, 01:01 AM
Tag Cloud
Collapse
Trending
Collapse
-
by djpaesganaHi i need help with a Dell latitude 14 5420 GDF40 LA-K491P Rev 2.0 (A01) 2020-11-16 , it charges on usb type C i checked the charger with a pd decoy and a electronic charge its ok when, i tested the usb c jack with a tail tester it reads ok [ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3637350}[/ATTACH] (photo incluided), then with a usb charge tester it looks like its trying to negotiate the PD but ressets i openned the laptop and with a thermal camera i noticed 3 ICS getting hot the TPS65994 (UT3) the ISL95860HRTZ...Yesterday, 08:12 PM
-
by krob80Hey everyone. I recently acquired a PS5 that is not turning on (no beep/power). PSU is good and there is no shorting on the 12V rail.
It came with a Gen3 SSD installed so I feel that things went down hill for the previous owner when it was installed. F7003 was blown but there was nothing shorting to ground. I replaced the fuse but still no power (new fuse is still good for now).
When connecting it to a bench power supply, it only pulls 10 mA (doesn't spike when first connected).
I noticed that there are a couple capacitors missing from the Vcore power regulator (pictures attached)....Today, 04:24 PM -
by wolf1976hi to all i want to ask if its possible tell me your opinion if acoording with the video is display problem ?
thanks on advance...Today, 02:35 PM -
by Habble7Hello everyone,
I'm trying to repair the power supply board from a Lenovo ThinkVision P40w-20 monitor. The board is labeled with the following markings:
- Main PCB code: ILPI-422 VA (dated 2021/11/24)
The monitor is completely dead, no power LED or backlight. Upon inspection, I found a few components that appear damaged, particularly some resistors that are burned and unreadable.
Attached is a high-resolution photo of the power supply board.
Does anyone have a schematic, boardview, or similar power supply that can help identify the...Today, 02:38 AM -
I haveTHOMSON N14C-4BK128
Any help in unlocking the password?
motherboard : IP3 GN10F MB V30 20230607A
...-
Channel: BIOS Requests ONLY!
Today, 07:21 AM -
-
by hrolHi. I have a motherboard PROX 1630-G3A with locked bios (PhoenixBIOS). A master-password was set. Can you help me unlock the bios. Thanks.......
-
Channel: BIOS & Schematic Requests!
Today, 08:22 AM -
-
by unimatrix93Hello everyone,
My egg incubator humidity sensor kicked the bucket, I read open circuit on it with DMM even in the MOhm range.
So I started identifying this piece of crap and look for a replacement part.
[URL=filedata/fetch?filedataid=384349][ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3637781}[/ATTACH][/URL] [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3637783}[/ATTACH]
This thing has 6 turns...Today, 08:10 AM -
by bulkchart32nichicon [TABLE]
[TR]
[TD]1500 µF 16 V Aluminum - Polymer Capacitors Radial, Can 8mOhm 2000 Hrs @ 105°C[/TD]
[/TR]
[/TABLE]
are what i used because i had heard the voltage doesn't matter as long as it is more than the original cap. i'm now reading that high voltage may make the cap's esr too high. is this a good cap for replacing those oem ones?1500 µF 16 V Aluminum - Polymer Capacitors Radial, Can 8mOhm 2000 Hrs @ 105°C Yesterday, 02:12 PM -
by sam_sam_samI bought a case of them the battery cells are made in China the charge curve looks decent for 1 amp charging rate there is also a BMS protection board which here is the website link to them
[URL]https://batteryhookup.com/collections/more-featured-products/products/new-full-case-100x-3-3v-2200mah-200x-18650-lifepo4-cells[/URL]
Here are more of the same but the difference is that they do not have the BMS protection boards but have the tabbing on them
[URL]https://batteryhookup.com/collections/lifepo4-cells/products/new-full-case-128x-3-3v-1100mah-lifepo4-power-cells[/URL]...03-09-2025, 02:30 PM -
Hello everyone,
Description : ASUS Vivobook Go 15
Model : E1504G
Serial Number : R5N0CV16Z138229
Product Number : E1504GA-BQ210W
CN : E4RK
MFD: 2023-05
MB : E1404GA_MB REV:2.0
I have a Bios here where the customer passworded the bios to start the system. Can someone help me with this, because I couldn't find the original bios. I am attaching the file with the bios downloaded from the chip.
Thank you very much in advance for your help....-
Channel: BIOS Requests ONLY!
08-06-2024, 08:02 AM -