MB schematic and boardview
[URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/96430-need-schematic-and-boardview-for-nm-d191?p=1802186#post1802186[/URL]
This one came in with no display complaint.
MB powering up with all CPU coil voltages of CPU and GPU present, appear to be drawing around 1 to 1.8 amps on boot cycle, then in 3 seconds CPU phases on PL3003,PL3002,PL3001,PL3000 disappear, leaving MB drawing only 0.25 amp with GPU core voltages still on....
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Yesterday, 04:21 AM
-
Hi everyone , I need your help with this board and it's giving me a hard time . 3 long and 2 shorts base on HP site it's a MEMORY ERROR , tried replacing RAM it's still the same. RAM VOLTAGE has 1.2V i think it has a complete voltage a 3.3v and there's also ah 2v , tried checking pins if there any damage or unsoldered and everythings good , now I don't what should I do next. Also tried reflashing and programming the bios and still the same, hopefully there's someone who can help me with this since im having like 4 laptop with the same error.Yesterday, 02:23 AM
-
Hello folks,
I have a Thinkpad E15 Gen2 with an AMD processor. NM-C771 motherboard GE520.
The PU202 gets hot. I was able to measure that there is a short circuit to ground at pin 13 (+3VL). All other pins are ok.
I've already taken a few measurements, but can't find the cause of the short circuit. Do you have any ideas?
I have already soldered out the PU202, but there is still a short circuit on the conductor track
Thank you and best regards09-15-2024, 09:57 PM -
Coke spilled on the computer that came from the customer. When it first arrived, there was data on the screen but it was shutting down immediately. After cleaning the motherboard, the device started but there was no image. Then I realized that there were missing parts around the integrated circuit in the picture. I need a high quality image of the motherboard for this part....10-02-2024, 01:38 PM
-
Hi guys,
It's my first post, because till now I found everything on this forum, but I'm little bit stuck now, so I'm asking you for help. It's my first gaming laptop, so I need some advice
.
I bought defect MSI GF66 Katana with GTX3060 GPU.
First when I open it - you can easily notice - somebody open it before, but I didn't found any tech working for it, just maybe somebody open it for cleaning.
What I did so far:
Replaced parts:[LIST][*]ALC233 - was exploded[*]APL5934C - was exploded[*]2x FDPC5018SG - went shorted when I took out UP1666Q.[*]UP9512Q...09-30-2024, 08:26 AM -
Hello Badcaps Members,
I'm experiencing an issue with my Lenovo ThinkPad E15 Gen 2, and I'm hoping someone here might have some insight. The laptop charges to full capacity, but as soon as I power it up, I get a loud sound, and there's no POST.
I disconnected the battery and connected a USB meter, which shows 20V 0.23A when the sound occurs. I've already tried changing the screen, but it didn't resolve the issue.
[B]When I use Lenovo PC Diagnostics App I get results as 01000[/B]
Here are the details:[LIST][*][B]Model[/B]: Lenovo ThinkPad E15...10-01-2024, 09:19 PM -
Hi
this is my first ever message in this forum that I follow for a very long time now and I have used the power of collective knowledge so many times.
I do repairs, not professionally (for the moment) and recently I stuck on a case with a L470 Lenovo laptop.
This laptop came to me with no power issue. I diagnosed it and I found the following.
1. A shorted and exploded ceramic capacitor (probably on main power rail)
2. Internally shorted the 3.3 ALWP buck converter
3. Shorted (drain to source to gate) the first DC-IN mosfet.
...10-02-2024, 03:51 PM -
Hello,
Need bios for that model. USB recovery not working (flashing 2 times caps-lock) with latest version. Older version is not opening in my computer to make USB recovery drive
MB nr DAY22AMB6E0 rev: E
Serial: 5cd43613lx...Yesterday, 07:27 AM -
I HAVE A MACBOOK PRO A2141 820-01700 THIS BOARD IS PP2V5_NAND_SSD1 SHORT TO GROUND THEN I CHECK ONE SIDE U8600 IS SHORT THIS SIDE IS ONLY ONE CHIP U8600 OTHER SIDE
PP2V5_NAND_SSD1 IS OK AND U9100 U9200 U9300 U9400 IS ALSO OK Will removing the U8600 fix the board or will I have to install a new one
[COLOR=#8e44ad][B]Link to boardview[/B][/COLOR] --> [URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/77986-schematics-boardview-macbook-pro-16-model-a2141-020-01...10-01-2024, 08:26 AM -
Got VW Bosch ECU with rotted away crystal oscillator and can't find frequency for it, it drives Bosch 30302 chip for which there is also no any datasheet. Markings on it says
453NDK9X.
and there is nothing on internets about it that I can find....10-02-2024, 09:50 AM
-
Hello
I need to unlock bios. Attached files.
Service tag: 5M98P93
Thanks...Yesterday, 08:26 PM -
[ATTACH=JSON]{"alt":"Click image for larger version Name:\txxxxx.png Views:\t0 Size:\t1.25 MB ID:\t3475007","data-align":"none","data-attachmentid":"3475007","data-size":"full","title":"mainboard.png"}[/ATTACH]
SERVICE TAG: 270Q3Z2
MAINBOARD: EDA50 LA-H271P Rev: 1.0
Hello, my BIOS has a password, I need a BIOS that unlocks my password.
I only have WINBOND 25Q80DVSIG1939 on the board
Found as a BIOS chip, a 1 MB file is stored there. I uploaded...Yesterday, 03:58 AM -
I purchased a used Samsung TV model UA65JS9000W recently knowing it had an issue with the screen. When switched on the picture was bright both sides of the screen but a little darker in the middle of the screen. Thinking this was the back lights (side mounted LCD strips) I replaced these, however the issue is still there. I am now thinking it may be a TCOM issue, but am not sure, any advice on this would be appreciated. Also whilst changing out the back lights I noticed the the thick clear plastic sheet (maybe 1.5 to 2mm thick) below the diffusers there is cracking (up to 75mm) on the sides and...Yesterday, 07:05 PM
-
Hi all i have an ideapad 330 (intel core i3 version)
I dont know exact model and serial number bottom sticker is erased.
All i have is original BIOSBIN pulled from original chip, motherboard model is: DG421 DG521 DG721 NM-B241 REV:1.0 2017-02-17
Symptom is computer starts but screen stays black please can anybody please fix this BIN for me please...Yesterday, 12:40 PM -
Hello, could you please 🙏 help me with the BIOS of this computer. I'm stuck in BIOS error. Backup and data attached
Lenovo E41-50
FLIT4 LA-K671P Rev. 1A Motherboard
S/N: MP29GTQ2
MTM: 82HW0011CL
MO: MPNXB262703T...Yesterday, 05:40 PM -
Hi
this is my first ever message in this forum that I follow for a very long time now and I have used the power of collective knowledge so many times.
I do repairs, not professionally (for the moment) and recently I stuck on a case with a L470 Lenovo laptop.
This laptop came to me with no power issue. I diagnosed it and I found the following.
1. A shorted and exploded ceramic capacitor (probably on main power rail)
2. Internally shorted the 3.3 ALWP buck converter
3. Shorted (drain to source to gate) the first DC-IN mosfet.
...10-02-2024, 03:51 PM -
I am trying to fix this 24Vcc swich power supply that has no output voltage. The problem might be in the PWM controller, however, I haven't been able to find the datasheet for this PWM IC tiny controller. Any idea?
(I am attaching some pictures for a better understanding of my troubleshooting)
[B]Tracking the PCB:[/B]
GND pin 1
Feedback pin 2
RI pin 3 (100k between pin and hot ground).
Sense pin 4 (470ohm to source)
Vdd is pin 5
Gate pin 6
Maybe it's just an [B]OB2262/ OB2263MP [/B](or could be replaced by...Yesterday, 02:29 AM -
Hello fellow bad caps members,
I have a Dell XPS 13 9730 that a picked up today. The seller claimed that it stops working all of a sudden. The ammeter reads 5V, 0.11A.
Could some help me out.
Thanks.08-24-2024, 10:26 PM -
Greetings, please can someone help me delete my bios password, please, latitud 5440 la-m401p service tag is B4QFSV3, please, I have already tried but I have not been successful....10-06-2023, 12:33 PM
-
Hey everyone!
I have a MacBook Pro A1989 with a 820-00850-A board that recently stopped working. I used it overnight to charge my phone, in the morning it didn't turn on, I assumed flat battery but now won't charge and doesn't start at all.
I have fully dissassembled it, when disconnected the battery reads at 0.012V. Even with the battery disconnected the laptop doesn't boot.
The diode voltages around all 4 CD3215's seem fine.
For all CD3215 (UB300, UB400, U3100 and U3200) I read just above 5V on PP20V_USBC_TA_VBUS, 3.3V on PP3V3UPC_TA_LDO, 1.8V...09-30-2024, 10:21 PM