Hi again guys. I have this motherboard that won't show display even tho it was doing it yesterday. I think something could've past away in the circuit.
I'd appreciate if anyone who is used to MOBO LCD voltages and circuits could enlighten me since this is the first time I have to deal with it.
I'm missing [B]+3VLCD.[/B]
This is the circuit
[URL=filedata/fetch?filedataid=339573][ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3284862}[/ATTACH][/URL] [URL=filedata/fetch?filedataid=339576][ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3284863}[/ATTACH][/URL]...
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: 45
Posts: 733
|
45 | 733 | ||||
Announcements & Related News
Site announcements, capacitor-related news, and anything relavant you might think of... Got News? POST IT!!
Topics: 236
Posts: 42,556
|
236 | 42,556 | ||||
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: 2
Posts: 5
Last Post:
ncp81208 datasheet
|
2 | 5 | ||||
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: 3,195
Posts: 32,744
Last Post:
How can I test non-polarized capacitor?
|
3,195 | 32,744 | ||||
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: 4,509
Posts: 74,899
|
4,509 | 74,899 | ||||
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: 3,997
Posts: 44,556
Last Post:
Adapter 24 volt problem
|
3,997 | 44,556 | ||||
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: 6,903
Posts: 37,764
Last Post:
ThinkCentre M70q 11DT
|
6,903 | 37,764 | ||||
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: 502
Posts: 5,459
Last Post:
4G LTE router sim socket replacement
|
502 | 5,459 | ||||
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: 32,318
Posts: 309,254
Last Post:
pls Bios HP Probook 450 G5
|
32,318 | 309,254 | ||||
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: 5,332
Posts: 75,749
|
5,332 | 75,749 | ||||
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: 27,509
Posts: 375,339
Last Post:
Pn64f8500
|
27,509 | 375,339 | ||||
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: 4,198
Posts: 65,367
Last Post:
iMac A1311 PSU repair questions
|
4,198 | 65,367 | ||||
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: 307
Posts: 1,690
Last Post:
Bios Canon mg 6853
|
307 | 1,690 | ||||
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: 2,344
Posts: 27,611
Last Post:
Yamaha RX-V577 - DC: PRT 000L
|
2,344 | 27,611 | ||||
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: 228
Posts: 3,943
Last Post:
Samsung WD80N645OOW died mid-cycle
|
228 | 3,943 | ||||
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: 1,023
Posts: 10,998
|
1,023 | 10,998 | ||||
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: 1,382
Posts: 19,500
|
1,382 | 19,500 |
What's Going On?
Collapse
There are currently 463061 users online. 4302 members and 458759 guests.
Most users ever online was 1,342,976 at 10:51 PM on 04-26-2024.
- alexfts20 ,
- bob223 ,
- jsjones ,
- EdwinC ,
- el_viajero ,
- nguyenthu200690 ,
- LatinMcG ,
- smoothedath2@gmail.com ,
- vanthuchn ,
- setback ,
- kaltmond ,
- DDC ll ,
- swerg ,
- captainedd15 ,
- mstore ,
- mahmoudna ,
- Sagnusm ,
- Sephir0th ,
- linfy ,
- alung ,
- jadao ,
- Caothuong1991 ,
- thienlaptop ,
- proaune1234 ,
- suresh ,
- mothaber ,
- hoangmusicbt ,
- suhaemi ,
- kangal ,
- reefcool ,
- AEV ,
- jimmyboyneutron ,
- Jund4n ,
- alphonse2024 ,
- bhatt ,
- syairien ,
- reformatt ,
- caique09 ,
- Nefilim ,
- SheepyTweeds ,
- yoko ,
- hoanghuy_mir ,
- myth_st ,
- Mr.Bit ,
- hoangnhan93100 ,
- Roberto Morales ,
- Stil86 ,
- taaknet ,
- ronelex ,
- Nicktronic ,
- pic16f84a ,
- yaso143 ,
- n3377 ,
- chinh ,
- Alima Sesay ,
- sumrak4 ,
- oldman63 ,
- speterpan ,
- datalabnz ,
- Kevin MOREL ,
- sergiogl95 ,
- andrey.br ,
- sulpheon ,
- angievargas88 ,
- Medicalcom ,
- jmserwis ,
- Osman05 ,
- abajor ,
- amoco ,
- ase19968 ,
- servitec66 ,
- baovethoigian ,
- cyngo ,
- thereedcloud ,
- said hemaidia ,
- Tastic ,
- axdann ,
- Konrado Pinheiro ,
- George's Tech Repairs ,
- hopkok ,
- monkeynuts ,
- tdelfy ,
- Shannon Ropoama ,
- bennyj ,
- Pedro Alves ,
- vincegsm ,
- ken19970620 ,
- Bainks03 ,
- alimohamed9001 ,
- coelectron ,
- Italyfan ,
- palembang ,
- adityanongdit ,
- Jokowie ,
- Rojeros ,
- dobleggil ,
- Boardsurfer ,
- KaminoReal ,
- nguyentu ,
- Miko Tungpalan ,
- Hellz ,
- iTec ,
- chobio ,
- pushparaj26 ,
- Chris@Kaddys ,
- nesredin ,
- AMATEURSAHIL ,
- jvakondios ,
- ShadXo ,
- C599 ,
- hugomac2575 ,
- Nelson Vise (Nevigsito) ,
- fackie ,
- Netby ,
- incendery_lemon
Badcaps Statistics
Collapse
Topics: 102,998
Posts: 1,277,433
Members: 499,568
Active Members: 18,278
Welcome to our newest member, setback.
Latest Topics
Collapse
-
by gjgibYesterday, 09:29 PM
-
by swergHey everyone,
I'm a novice trying to repair my laptop. The LCD screen has an image, but no LED backlight for the image. It also produces an image when connected to an external monitor.
I have found what I believe to be a blown inductor labeled "L4502" and "120 Ohm" in the schematics (zoomed in image, blue arrow to blown component). I have included an image of the general area of the mobo and an excerpt from the schematics as well.
I am having trouble selecting a replacement component, which I believe to be a 120 Ohm ferrite bead, from the components...Today, 03:39 PM -
by abajorI have this 1707 with the 5V 0A power loop issue on 3 of the jacks.
One of the CD3215C00 had corrosion under one side U3100 to be precise.
This USB jack was drawing ~.2A and not boot looping.
After replacing the CD3215 I am having an odd problem. I can rotate the USB-C and it only works in one orientation. And now it boot cycles, like the other usb channels so I'm part way there.
After looking at the schematic and board view. It makes very little sense that this is happening since they both pin 59 and pin 60 both go to the same places on J3300.
...Today, 08:02 PM -
by antibotandaxktdmb8c0
Maybe someone has a photo of a section of the board, otherwise there are no diagrams or boardview...Yesterday, 12:31 PM -
by TechGeekThe title basically says it all. The card displays randomly placed blue pixels on the screen (especially when rendering 3D stuff), the right edge of the screen is garbled in VGA mode, and it sometimes fails to re-initialize on a reboot or when trying to wake up the display. Bad VRAM? Dud GPU?Today, 07:41 PM
-
by mrsithHi fellow lifesavers.
I have a Samsung washer-dryer WD80N645OOW which died mid-cycle. No response to anything, completely dead.
Checked the socket, the plug fuse, all good. Took it out to examine the boards.
There is a relay clicking on the mainboard. Upon applying power, I can see a diode flashing on inverter board, after a while a diode on main board lits up for a split second, then I can hear a relay clicking. This repeats a few times, then everything dies completely.
I've been trying to examine the main board, but it's a bit difficult becuse...4 PhotosToday, 09:11 AM -
by bohabohaThe HILTI CPC battery flashes green but no tool starts or works. when testing the battery has 19.2v what could be the problem with them because I have three similar ones but there is nothing written on them all the patches are removed in the first B22 /4.0 with 19.2v the second one B22 /5.2 with 21.8v the third B22 /4.0 with18.3v are all three destroyed ? a bit difficult to believe have also tried other Hilti tools the same thing if someone who can help very grateful...06-03-2024, 08:05 AM
-
by tvtimmyI'm working on the y-main board and I need help figuring out what Q5019 and Q5021 are. They are made by AUK and the first 3 identifying marks are SMK. The rest are blown off and lost. The board is LJ92-01935A....06-01-2024, 11:47 AM
-
by slugpoaBios registered (locked), I will upload the dump here if anyone can help me unlock it.
Bios cadastrado (bloqueado), farei upload do dump aqui se alguém puder me ajudar a desbloqueá-lo....-
Channel: BIOS Requests ONLY!
Today, 03:34 PM -
-
by pastorelloHello,
I need the BIOS for the Acer A315-510P with the nb6301a_mb_v3 motherboard. Notebook is not turning on and everything indicates that the bios is corrupted, if you could send me a backup-
Channel: BIOS Requests ONLY!
Today, 03:22 PM -
Tag Cloud
Collapse
Trending
Collapse
-
by abajorI have this 1707 with the 5V 0A power loop issue on 3 of the jacks.
One of the CD3215C00 had corrosion under one side U3100 to be precise.
This USB jack was drawing ~.2A and not boot looping.
After replacing the CD3215 I am having an odd problem. I can rotate the USB-C and it only works in one orientation. And now it boot cycles, like the other usb channels so I'm part way there.
After looking at the schematic and board view. It makes very little sense that this is happening since they both pin 59 and pin 60 both go to the same places on J3300.
...Today, 08:02 PM -
by TechGeekThe title basically says it all. The card displays randomly placed blue pixels on the screen (especially when rendering 3D stuff), the right edge of the screen is garbled in VGA mode, and it sometimes fails to re-initialize on a reboot or when trying to wake up the display. Bad VRAM? Dud GPU?Today, 07:41 PM
-
by swergHey everyone,
I'm a novice trying to repair my laptop. The LCD screen has an image, but no LED backlight for the image. It also produces an image when connected to an external monitor.
I have found what I believe to be a blown inductor labeled "L4502" and "120 Ohm" in the schematics (zoomed in image, blue arrow to blown component). I have included an image of the general area of the mobo and an excerpt from the schematics as well.
I am having trouble selecting a replacement component, which I believe to be a 120 Ohm ferrite bead, from the components...Today, 03:39 PM -
by pastorelloHello,
I need the BIOS for the Acer A315-510P with the nb6301a_mb_v3 motherboard. Notebook is not turning on and everything indicates that the bios is corrupted, if you could send me a backup-
Channel: BIOS Requests ONLY!
Today, 03:22 PM -
-
I started troubleshooting this Razer Blade 15 laptop DA560 motgerboard a while back, due to some shorted 19v, 5v, 1v power rails. I fixed some of components and think 19v rail is good, 5v rail is good, 3v is better but not all way i think, and 1v is still bad. At this point the diode reading on these rails are 19v - 0.032v , 5v - 0.167v, 3 - 0.63v and 1v - 0.005v .
When the rails when down, I went down different rabbit holes and seeing chips getting pretty warm on thermal but not blazing hot. Yet there were not any caps or any small components getting blazing hot. Example is EC chip,...1 PhotoToday, 11:35 AM -
by gjgibHi again guys. I have this motherboard that won't show display even tho it was doing it yesterday. I think something could've past away in the circuit.
I'd appreciate if anyone who is used to MOBO LCD voltages and circuits could enlighten me since this is the first time I have to deal with it.
I'm missing [B]+3VLCD.[/B]
This is the circuit
[URL=filedata/fetch?filedataid=339573][ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3284862}[/ATTACH][/URL] [URL=filedata/fetch?filedataid=339576][ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3284863}[/ATTACH][/URL]...Yesterday, 09:29 PM -
by mrsithHi fellow lifesavers.
I have a Samsung washer-dryer WD80N645OOW which died mid-cycle. No response to anything, completely dead.
Checked the socket, the plug fuse, all good. Took it out to examine the boards.
There is a relay clicking on the mainboard. Upon applying power, I can see a diode flashing on inverter board, after a while a diode on main board lits up for a split second, then I can hear a relay clicking. This repeats a few times, then everything dies completely.
I've been trying to examine the main board, but it's a bit difficult becuse...4 PhotosToday, 09:11 AM -
by antibotandaxktdmb8c0
Maybe someone has a photo of a section of the board, otherwise there are no diagrams or boardview...Yesterday, 12:31 PM -
by OmronI have a 5W lamp on 12Volts battery, I want it to be half as bright, so I will add a resistor. What resistor should I supply?
A = W = 5 = 0.416mA
_ _
V 12
R = V = 12 = 28.84 Ohms (R) this is resistance of lamp
_ _____
I 0.416
So I will add one resistor 28.84 Ohms
I will have 28.84 + 28.84 = 57.6 Ohms
Or 28.84 + 28.84 = 14.42 Ohms
I don't know if it will work in series or in parallel
voltage would be 6V and amp current mA = 0.208mA We divide everything by two
W= V * I...06-04-2024, 01:58 AM -
by chamalsb[B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
[I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
[I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]
[I][B][SIZE=16px]please give me, me cleared bios or backup bios from same model asap.[/SIZE][/B][/I][B][SIZE=16px][U]Singer X455U[/U] BIOS need (6-71-w94p0-d02)[/SIZE][/B]-
Channel: BIOS Requests ONLY!
Today, 07:26 AM -