Hello everyone, I come here in search of wisdom and hope.
I got this laptop with charging problems, apparently it charged ok while turned off but it would not charge while powered on, anyways I was doing initial measurements looking at the voltaje on the ID Pin, it is a 135W DC Adapter and the pin actually measured 1.9V that looks ok, anyways, while doing that, I accidentally shorted the ID pin DETECT(ID) with one of the 20V pins, sparkles and it automatically killed the TVS Diode PD102, and also made a cute burning hole on the middle of the KBC or EC chip UE1, it is a IT8227E-128,...
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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.
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ncp81208 datasheet
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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!
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| Troubleshooting Hardware & Devices and Electronics Theory | ||||||
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General Electronics Technical Discussion
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Need help to identify IC
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Schematic and boardview needed for 820-4668
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Security camera linking remotely to NVR
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Asus VG278 mosfet identification ?
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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!
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by CapLeaker
Today, 02:17 PM
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Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices
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Hello Need DumpsFile for TS3150
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Troubleshooting Game Consoles & Other Weird Devices
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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: 1,374
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[INDENT]Hey everybody, got that specific notebook, bought it second hand. There was no ssd inside I placed the new ssd and tried to start the laptop but the only thing I get when I start up is a black screen and the keyboard is lighted up and changes the colors. No fan spinning ( but the downside is getting warm so the cpu is working I guess) and the led for charging the battery is on. Can't boot into the bios via f2. It's now looking like I bought a brick and got scammed.. can anybody help me out with this problem please?[/INDENT]...Today, 02:01 AM
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Hi, everyone. First post of an actual repair. I'm a technician but a complete newbie with laptops.
So I got this Dell Inspiron to play with.
No charger, so I connected to my bench PSU.
The laptop also didn't include: hard disk (I added one of my own for testing, see below) and wireless PCB (but I doubt this could have anything to do with this particular failure).
------What it did (and didn't do)------
1) I turned it on and it powered on. Powered down in 2 seconds by itself.
2) Removed RAM, changed slot. Same...04-04-2024, 12:39 PM -
Hi all,
Recently picked up this GTX1650 at a local flea market for a low price and wanted to use it on my secondary PC. I first tested the card and saw the fan spin for a split second and then nothing. Immediately I thought of a short circuit. Disassembled and found a shorted SMD capacitor, injected voltage into it (1V/4A) and two Mosfets got hot immediately (QN3103 & QN3107). Desoldered these Mosfets and the card turned back to life.
Bought replacements from Aliexpress and replaced them afterwards. Tried the card but still the saw the fan spin for a split second...Yesterday, 03:15 PM -
Hello,
My Asus monitor stop working today !! I found the problem on the main board, the power supply board is ok. It's Q9, a mosfet but I have no idea what are the specs since I don't have the schematic for that monitor !!
Can someone help me identified this mosfet ?
Thank you !04-16-2024, 01:15 PM -
Hello,
i need Bios for Mi Gaming laptop core i5 G7
The laptop turn on and screen stay black not booting ( sometimes goes to li logo and freeze)
Thanks...Yesterday, 04:49 PM -
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"1.jpg","data-attachmentid":3256112}[/ATTACH]
When replacing the screen of this MacBook model, the DP855A chip must be moved from the existing screen for the screen to operate properly.
However, when I removed the DP855A chip from the existing screen, I must have done something wrong and the chip broke.
Testing the chip pins with a multimeter revealed a short circuit inside the chip.
Is it impossible to repair this? I couldn't find a programmer...Today, 08:51 PM -
Hi as you can see from title, I have a samsung tv here that will show the smart tv logo and then no picture after that even hitting input or menu on remote and shows nothing but the backlight still appears to be on. The tv will turn itself off after a minute or so automatically. I'm somewhat confused if this is either a eeprom problem or a bad led strip problem. The power supply makes a pretty noticeable humming sound when it's turned on leading me to believe one of the leds are shorted but idk honestly. Any of you guys have any help for me? I have a good multi meter and can take pictures of whatever...04-13-2024, 10:05 PM
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When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.
[ATTACH=JSON]{"alt":"Click image for larger version Name:\tIMG-1100.jpg Views:\t0 Size:\t100.2 KB ID:\t3255736","data-align":"none","data-attachmentid":"3255736","data-size":"full","title":"IMG-1100.jpg"}[/ATTACH]
Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local...Today, 05:19 AM -
hello.
I came across this thing and im not sure what it is exactly, I have never seen such thing before.
I know it gotta be some kind of diode with Drain, Source and Gate1 and gate2
It resides in AM/FM module and im measuring 200ohm across D and S.
[ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"705","title":"image.png","width":"782","data-attachmentid":3256012}[/ATTACH]hello.
I came across this thing and im not...Today, 03:05 PM
-
hello.
I came across this thing and im not sure what it is exactly, I have never seen such thing before.
I know it gotta be some kind of diode with Drain, Source and Gate1 and gate2
It resides in AM/FM module and im measuring 200ohm across D and S.
[ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"705","title":"image.png","width":"782","data-attachmentid":3256012}[/ATTACH]hello.
I came across this thing and im not...Today, 03:05 PM -
Hi All,
Laptop: ASUS F15 TUF Dash FX517ZC-HN114W
Context: When I was out the house my partner hard shutdown laptop while BIOS was updating, so my son has no working laptop now. Also as a result I know the BIOS on the chip is messed up so I can’t extract it using the ch341a and use it to perform the method explained on site to modify an update downloaded from the ASUS website to get the BIN to flash.
If anyone can help with a BIOS BIN/ROM file for this laptop, I would be forever in your debt! Thanks if you can help!
Assuming it is less than 2MB as...Today, 02:43 PM -
[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"1.jpg","data-attachmentid":3256112}[/ATTACH]
When replacing the screen of this MacBook model, the DP855A chip must be moved from the existing screen for the screen to operate properly.
However, when I removed the DP855A chip from the existing screen, I must have done something wrong and the chip broke.
Testing the chip pins with a multimeter revealed a short circuit inside the chip.
Is it impossible to repair this? I couldn't find a programmer...Today, 08:51 PM -
Hi All,
I have a Vizio E320-A1 which lost sound and picture. The power LED comes on and stays on but nothing else works. I am not able to power it off unless I unplug it.
Here are the voltages when the power is on
1 - 5.25
2 - 5.25
3 - 0
4 - 4.8
5 - 25
6 - 25
7 - 0
8 - 0
9 - 0
10 - 12
11 - 12
12 - .9
13 - .5
[ATTACH=JSON]{"data-align":"none","data-size":"thumb","title":"2024_04_19_13_08_IMG_2008.jpg","data-attachmentid":3255895}[/ATTACH][ATTACH=JSON]{"data-align":"none","data-size":"thumb","title":"2024_04_19_13_08_IMG_2009.jpg","data-attachmentid":3255896}[/ATTACH][ATTACH=JSON]{"data-align":"none","data-size":"thumb","title":"2024_04_19_13_08_IMG_2010.jpg","data-attachmentid":3255898}[/ATTACH][ATTACH=JSON]{"data-align":"none","data-size":"thumb","title":"2024_04_19_13_08_IMG_2011.jpg","data-attachmentid":3255899}[/ATTACH]...Today, 11:33 AM -
Hello everyone,
I'm trying to fix a small LG TV with wierd issue.
So I check that the display is OK by fashing a lamp at the screen. LCD is okay OSD is showing up.
Now since the BL is dark, I disconneted the BL from the mainboard and I injected voltage to it with my blacklight tester.
The BL turns on, the tester shows around 80V. So the led strips are okay it seems.
Now I started to suspect the BL driver IC which is a MP3378.
I have a donor board (dead cpu) with the same IC, so I swapped the driver IC but it did not solve the issue.
...Today, 07:59 AM -
Hi all,
Recently picked up this GTX1650 at a local flea market for a low price and wanted to use it on my secondary PC. I first tested the card and saw the fan spin for a split second and then nothing. Immediately I thought of a short circuit. Disassembled and found a shorted SMD capacitor, injected voltage into it (1V/4A) and two Mosfets got hot immediately (QN3103 & QN3107). Desoldered these Mosfets and the card turned back to life.
Bought replacements from Aliexpress and replaced them afterwards. Tried the card but still the saw the fan spin for a split second...Yesterday, 03:15 PM -
Hello,
We have this set here in our shop that is not ginving sign of life besides red light that is blinking one time after pressing the button and nothing more... After detaching the mainboard from the PSU (this set has separate board thank god?! or not...) the backlight comes on. After reattaching nothing besides red light.... Can anyone from the forum help me here? Thank you in advance. Here's a link with images of the mainboard and the memory IC's that are on it.
Regards, Norbert!...04-17-2024, 06:54 AM -
Hello everyone, I come here in search of wisdom and hope.
I got this laptop with charging problems, apparently it charged ok while turned off but it would not charge while powered on, anyways I was doing initial measurements looking at the voltaje on the ID Pin, it is a 135W DC Adapter and the pin actually measured 1.9V that looks ok, anyways, while doing that, I accidentally shorted the ID pin DETECT(ID) with one of the 20V pins, sparkles and it automatically killed the TVS Diode PD102, and also made a cute burning hole on the middle of the KBC or EC chip UE1, it is a IT8227E-128,...Today, 01:04 PM -
I have a klipsch kda-500 that would turn on and allow me to get into the web management but it was picking up a lot of noise from audio sources so i decided to replace the smd caps on the power supply along with radial one. Some one was in here before me and they basically burned the bottom side of the traces off for the radial cap but i was able to repair it without any real problem. I thought i did a good job sourcing out replacement caps but apparently not and now i can't get the power supply to turn on it just constantly try's to keep turning on. Attached is a picture of the power supply before...Yesterday, 03:50 PM
-
Hi guys.
I own Alienware 17 r3 6820HK GTX 980M.
I purchased it recently tried some gaming (Rise of the Tomb Raider, Serious Sam) and after 10-15.min games freeze, but I could hear audio from game.
Now I am not yet at home, but when it happens I do get separate window error message and will post it later.
Then again there are moments when I could play for like an hour and no errors.
From my experience reading about this issue, this means my GPU is dying, correct?
I installed most recent nVidia drivers.
Temp of GPU while gaming is max 76 C, but usually around...Today, 12:07 PM