Hi guys, I have this macbook a1278 which doesn't have any image on the display, but when I turn it on I hear the chime.
I found the L9008 choke open and reset it.
When I turn on the macbook I have about 3v on pins 3 and 4 of the display so everything is ok but I still don't have the image.
On the backligt pin 21 and 22 I have 0v but the fuses are all ok.
What can I check?
I tried another display from a macbook a1278 but from the previous year and it still doesn't work.
No content found
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: 235
Posts: 42,426
|
235 | 42,426 |
|
|||
| 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
|
1 | 4 |
|
|||
| 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: 3,192
Posts: 32,725
|
3,192 | 32,725 | ||||
|
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: 4,504
Posts: 74,881
Last Post:
IC Identification with the marking "ON"
|
4,504 | 74,881 |
|
|||
| 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: 3,989
Posts: 44,498
|
3,989 | 44,498 | ||||
|
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: 6,877
Posts: 37,652
Last Post:
NCR_MILANO_V3.1 bios password
|
6,877 | 37,652 |
|
|||
|
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: 501
Posts: 5,455
|
501 | 5,455 |
|
|||
|
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: 32,215
Posts: 308,098
Last Post:
Asus GL503V, DABKLMB28A0 REV:A
|
32,215 | 308,098 |
|
|||
|
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: 75,741
Last Post:
Dell SE2719H - won't start
|
5,332 | 75,741 |
|
|||
|
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: 27,496
Posts: 375,231
|
27,496 | 375,231 |
|
|||
|
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: 4,195
Posts: 65,323
Last Post:
Omega MML200 Coutant Lambda PSU repair
|
4,195 | 65,323 |
|
|||
|
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: 305
Posts: 1,685
Last Post:
UTI 260b stuck on loading screen
|
305 | 1,685 |
|
|||
|
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: 2,343
Posts: 27,603
Last Post:
STK4392 pin out
|
2,343 | 27,603 |
|
|||
|
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: 226
Posts: 3,952
Last Post:
Xiaomi Roidmi EVE Pro battery died!
|
226 | 3,952 |
|
|||
|
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: 1,017
Posts: 10,947
Last Post:
playstation 5 digital firmware dump
|
1,017 | 10,947 |
|
|||
|
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: 19,493
|
1,382 | 19,493 |
|
|||
-
Yesterday, 02:17 AM
-
Hi,
I have this laptop HP x360 1030 G2.
Battery is charging well, the laptop powers on the CPU gets warm but nothing on the internal screen or hdmi.
The fan is spinning at full speed.
Any idea ?
I just asked for a schematic i cannot find it.Today, 05:25 AM -
GOOD DAY,
I NEED HELP SOMEONE KNOWS WHAT CHARGING IC HANDLES THIS BOARD, IT IS FROM A LENOVO S410P, BUT I REMOVED THE INTEGRATED ONE AND IT IS IN VERY BAD CONDITION YOU CAN'T SEE THE LETTERS.
IT'S A "BQ"...05-22-2024, 11:44 AM -
Hi all,
Model: HP Pavilion 14-ce3010nh 8BV97EA
Board number: DAG7ALMB8C0 - G7AL REV C
Issue: I have an HP Pavilion 14-ce3010nh 8BV97EA laptop. When plugged into the charger, it turns on, but there is no display, the fans do not run, and the processor gets slightly warm. Unfortunately, I haven't been able to figure out what the problem is. I've reflashed the BIOS twice without any success. No post. Already tried out with another ram stick with no luck
I measured the voltage with the HP turned on in red, and I measured their resistance with the HP turned off in green....Today, 04:10 AM -
hey guys..
can we recover/find pw from dump..? i tried many pw from pw generators but not sucess.. it has Hi 3520 cpu.....Today, 08:34 AM -
Scanned motherboard in 1200DPI
And here is the BDV schematic: [ATTACH=JSON]{"data-align":"none","data-size":"full","data-attachmentid":3280943}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"full","data-attachmentid":3280944}[/ATTACH]
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/88505-da0x8mm6d0-rev-d-schematic-needed[/url]Scanned motherboard in 1200DPI...Today, 08:25 AM -
Hey guys looking for the Bios for an Asus ROG G713PV-DS94
Motherboard Number is g713p-mb-VGT 6050A3468901-MB-A01
Serial Number is R3NRKD03613412E
i am not sure if any additonal information is needed if so let me know and i can update this post. Things i have tried are to download the BIOS directly from Asus but that file is a .329 file and is 32MB as opposed to the 16MB file i need. Scoured high and low and cant find this darn BIOS anywhere! Much appreciated!!...05-08-2024, 02:29 PM -
Haptic feedback on the trackpad works, and the app configurator on other MacBooks recognizes this MacBook.(not DFU status) That is, the power is turned on normally. However, nothing is output on the screen. no backlight, no image.
Both screen and screen cables are fine.
The result of the logic board check is as follows.
PP1V8_S2 = 1.8v
PP3V3_S2 = 3.3v
PP5V_S2 = 5v
PP3V8_AON_VDDMAIN = 3.8v
PP5V_SW_LCD = 0v
PP3V3_SW_LCD = 0v
PPVOUT_LCDBKLT = 0v
LCD_PWR_EN = 0v
PMU_SYS_ALIVE = 1.8v
There is no short circuit in...Today, 07:59 AM -
[COLOR=#f1c40f][B]Scanned motherboard in 1200DPI[/B][/COLOR]
[B][URL="https://www.intel.com/content/www/us/en/products/sku/226261/intel-core-i51235u-processor-12m-cache-up-to-4-40-ghz/ordering.html"]CPU: i5-1235U[/URL][/B]
[COLOR=#f1c40f][B]Scanned motherboard in 1200DPI[/B][/COLOR]
[B][URL="https://www.intel.com/content/www/us/en/products/sku/226261/intel-core-i51235u-processor-12m-cache-up-to-4-40-ghz/ordering.html"]CPU: i5-1235U[/URL][/B]
[COLOR=#f1c40f][B]Scanned motherboard in 1200DPI[/B][/COLOR]
[B][URL="https://www.intel.com/content/www/us/en/products/sku/226261/intel-core-i51235u-processor-12m-cache-up-to-4-40-ghz/ordering.html"]CPU:Today, 07:51 AM -
I am struggling with a Clevo NL51RU linux laptop that does not boot because of a corrupt main bios.
I did not succeed to build a new bios. Maybe somebody has more experience with this laptop and can build a working bios for me or has a working dump.
Clevo NL51RU
ser: NKNL51RU0001D00318
Many thanks!...05-27-2024, 11:02 AM
-
Hi all,
Model: HP Pavilion 14-ce3010nh 8BV97EA
Board number: DAG7ALMB8C0 - G7AL REV C
Issue: I have an HP Pavilion 14-ce3010nh 8BV97EA laptop. When plugged into the charger, it turns on, but there is no display, the fans do not run, and the processor gets slightly warm. Unfortunately, I haven't been able to figure out what the problem is. I've reflashed the BIOS twice without any success. No post. Already tried out with another ram stick with no luck
I measured the voltage with the HP turned on in red, and I measured their resistance with the HP turned off in green....Today, 04:10 AM -
Hi,
I have this laptop HP x360 1030 G2.
Battery is charging well, the laptop powers on the CPU gets warm but nothing on the internal screen or hdmi.
The fan is spinning at full speed.
Any idea ?
I just asked for a schematic i cannot find it.Today, 05:25 AM -
Hello, I'm trying to remove the password from an HP Elitebook 650 G10. It's motherboard has two chips, a 32mb spi (W25Q256JVEN) and 32mb ec (GD25B256EYIG). I have created a dump of each, but don't know which one(s) to patch. Could someone point me in the right direction or just patch it for me?...Yesterday, 06:29 PM
-
Hi,
Is there a schematic/ boardview for this laptop ?
Thank you in advance.Today, 05:22 AM -
hey guys..
can we recover/find pw from dump..? i tried many pw from pw generators but not sucess.. it has Hi 3520 cpu.....Today, 08:34 AM -
Scanned motherboard in 1200DPI
And here is the BDV schematic: [ATTACH=JSON]{"data-align":"none","data-size":"full","data-attachmentid":3280943}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"full","data-attachmentid":3280944}[/ATTACH]
[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/88505-da0x8mm6d0-rev-d-schematic-needed[/url]Scanned motherboard in 1200DPI...Today, 08:25 AM -
Haptic feedback on the trackpad works, and the app configurator on other MacBooks recognizes this MacBook.(not DFU status) That is, the power is turned on normally. However, nothing is output on the screen. no backlight, no image.
Both screen and screen cables are fine.
The result of the logic board check is as follows.
PP1V8_S2 = 1.8v
PP3V3_S2 = 3.3v
PP5V_S2 = 5v
PP3V8_AON_VDDMAIN = 3.8v
PP5V_SW_LCD = 0v
PP3V3_SW_LCD = 0v
PPVOUT_LCDBKLT = 0v
LCD_PWR_EN = 0v
PMU_SYS_ALIVE = 1.8v
There is no short circuit in...Today, 07:59 AM -
[COLOR=#f1c40f][B]Scanned motherboard in 1200DPI[/B][/COLOR]
[B][URL="https://www.intel.com/content/www/us/en/products/sku/226261/intel-core-i51235u-processor-12m-cache-up-to-4-40-ghz/ordering.html"]CPU: i5-1235U[/URL][/B]
[COLOR=#f1c40f][B]Scanned motherboard in 1200DPI[/B][/COLOR]
[B][URL="https://www.intel.com/content/www/us/en/products/sku/226261/intel-core-i51235u-processor-12m-cache-up-to-4-40-ghz/ordering.html"]CPU: i5-1235U[/URL][/B]
[COLOR=#f1c40f][B]Scanned motherboard in 1200DPI[/B][/COLOR]
[B][URL="https://www.intel.com/content/www/us/en/products/sku/226261/intel-core-i51235u-processor-12m-cache-up-to-4-40-ghz/ordering.html"]CPU:Today, 07:51 AM -
Going to replace op-amps in a guitar amp jcr072d
so TI versions have suffix D IP etc. There didn’t seem to be an explanation of these anywhere. I think they indicate the physical pin characteristics but what do they represent- anyone have a list.Yesterday, 03:06 PM -
Please help with bios repair of Lenovo ThinkCentre M70t Gen 3 corrupt bios. Pc gives beep without ram but no display with ram. Ram and processor are ok. If possible, add DMI information to new bios.
Lenovo ThinkCentre M70t Gen 3 (12th gen)
Machine type: 11XE
Serial Number: PC2G4T4S
Motherboard: I670MS...Today, 06:34 AM