neoopus

New Member
Joined
May 30, 2024
Messages
1
Likes
0
Points
1
Age
45
#1
Hi,

I am looking for the schematic of this motherboard or this component, PQB4 reference (Unable to read the text beyond P5)

Also, if someone with experience could tell me, why would this component burn in order to avoid this happening again?

Thank you.
 

Attachments

Laptop repair Latest videos

Latest threads

Acer Spin SP114-31 n20w2

im searching the boardview for Acer Spin SP114-31 n20w2 model please anybody help

ALEXSOF DDR4 LAPTOP RAM TESTER measuring voltages,POST codes ,analyzing data protocol,read SPD firmware

Overview
ALEXSOF DDR4 Analyzer card is designed to diagnose motherboard issues by measuring the main voltages in the circuit, displaying POST codes, and analyzing data protocol, configuration lines, read SPD firmware, more.
Instructions for Use
  • Incorrect Connection: If there’s an incorrect connection on any of the lines, “FLOAT” will appear.
  • Voltage Issues: It can check all voltages instantly (SPD, VDD, VTT, RCA, VPP, RST) If the voltage is incorrect on any line, it will display with a different background color than the other voltages.
  • POST Codes: For motherboards designed with POST code support, the codes will display. For those not designed for this, activity on the SMBUS will indicate connection availability.
  • BUS Display: Instantly and quickly displays all processors, chips, RAM, and other components connected to the SMBUS
  • Internal CPU thermal sensor.
  • Additional thermal sensors or component monitoring.
  • Power monitoring and voltage regulation.
  • DIMM thermal sensors.
  • Platform-specific sensors.
  • Often related to power delivery and monitoring.
  • Serial Presence Detect (SPD) EEPROMs
  • Used for integrated voltage regulators.
  • Specific to some AMD chipset features.
  • integrated voltage regulators.
  • MODE Button: A long press and release initiates processing of the internal firmware of the RAM and provides information about the motherboard configurations and temperature sensors that operate on the same protocol.
  • VDDSPD Indicator: Indicates power status.
  • RST Indicator: Shows whether the reset signal is active low or high



    • ALEXSOF GENERATOR
    • GEN SPD If 2 jumpers are placed in this place, it will connect the external SPD CHIP that has a place on the back of the tester (two different 8 pins package) with the SMBUS this is useful for motherboards that have one RAM slot.
    • GEN RST If you want to generate a reset signal, place a jumper in this place.
    • PULL RST In case you want a suitable voltage for the reset signal instead of the missing voltage.
    • TEST POINTS THERE ARE 9 IMPORTANT TEST POINTS you can use them directly and easily.
    VIDEO LINK ON YOUTUBE
LINK TO BUY https://alexsof.com/shop-2/

ALEXSOF DDR3 LAPTOP RAM TESTER measuring voltages,POST codes ,analyzing data protocol,read SPD firmware

Overview
ALEXSOF DDR3 Analyzer card is designed to diagnose motherboard issues by measuring the main voltages in the circuit, displaying POST codes, and analyzing data protocol, configuration lines, read SPD firmware, more.
Instructions for Use
  • Incorrect Connection: If there’s an incorrect connection on any of the lines, “FLOAT” will appear.
  • Voltage Issues: It can check all voltages instantly (SPD, VDD, VTT, RCA, RDQ, RST) If the voltage is incorrect on any line, it will display with a different background color than the other voltages.
  • POST Codes: For motherboards designed with POST code support, the codes will display. For those not designed for this, activity on the SMBUS will indicate connection availability.
  • BUS Display: Instantly and quickly displays all processors, chips, RAM, and other components connected to the SMBUS
  • Internal CPU thermal sensor.
  • Additional thermal sensors or component monitoring.
  • Power monitoring and voltage regulation.
  • DIMM thermal sensors.
  • Platform-specific sensors.
  • Often related to power delivery and monitoring.
  • Serial Presence Detect (SPD) EEPROMs
  • Used for integrated voltage regulators.
  • Specific to some AMD chipset features.
  • integrated voltage regulators.
  • MODE Button: A long press and release initiates processing of the internal firmware of the RAM and provides information about the motherboard configurations and temperature sensors that operate on the same protocol.
  • VDDSPD Indicator: Indicates power status.
  • RST Indicator: Shows whether the reset signal is active low or high.



  • ALEXSOF GENERATOR
  • GEN SPD If 2 jumpers are placed in this place, it will connect the external SPD CHIP that has a place on the back of the tester (two different 8 pins package) with the SMBUS this is useful for motherboards that have one RAM slot.
  • GEN RST If you want to generate a reset signal, place a jumper in this place.
  • PULL RST In case you want a suitable voltage for the reset signal instead of the missing voltage.
  • TEST POINTS THERE ARE 9 IMPORTANT TEST POINTS you can use them directly and easily.
  • LINK TO BUY https://alexsof.com/shop-2/

HP Probook 450 G8 not deleting old owner"s windows login

I've got an HP probook 450G8 that i used disk utilities in BIOS to erase the hard drive then installed windows 11 using a USB drive. well every time I launch windows it comes to the previous owner's llog in page. i can only access accessabilities setting. How can I delete that for good?

Clevo P671sa (P705) HM87 i7 4720

Hello. anyone has the board view cad file of this laptop? please share it, thanks.

HP ENVY Laptop 17-cg1008ca Motherboard GPT70 LA-J504P

Hi,

I am looking for the schematic of this motherboard or this component, PQB4 reference (Unable to read the text beyond P5)

Also, if someone with experience could tell me, why would this component burn in order to avoid this happening again?

Thank you.

HP EliteBook 745 G6 6050A3044201 bios dump u365 , u401

HP EliteBook 745 G6
6050A3044201
u365 , u401
bios dump

Freelance VHDL Programmer Opportunity

Freelance VHDL Programmer Opportunity

Are you an experienced VHDL programmer seeking a challenging freelance project?

Alexsof is looking for a highly skilled VHDL expert to contribute to a significant digital system design initiative.

About the Project:
We require a proficient VHDL programmer to develop and optimize VHDL code for a critical project. This role offers an excellent opportunity to demonstrate your expertise and make a meaningful impact on our innovative efforts.

Qualifications:
Extensive VHDL Experience: Proven track record in VHDL programming.

FPGA/ASIC Expertise: Strong background in FPGA and ASIC design and implementation.

Technical Proficiency: Familiarity with simulation tools and hardware description languages.

Problem-Solving Skills: Exceptional ability to troubleshoot and resolve complex issues.

Attention to Detail: High standards for accuracy and quality.

Deadline-Oriented: Ability to deliver top-quality work within stringent timelines.

Project Details:
Duration: Short-term (estimated 2 weeks).

Scope: Focus on the development, testing, and optimization of VHDL code for a targeted application.

Collaboration: Remote work with our team.

Compensation: To be discussed.

If you meet the qualifications and are interested in this opportunity, please submit your resume and a brief summary of your relevant experience to: team@alexsof.com

HP AIO DAN18MB48A0 PC 24-cb1000i 4N1P3AV N18D 089E8 BIOS DUMP

HP AIO PC 24-cb1000i
4N1P3AV N18D 089E8
DAN18MB48A0
BIOS DUMP

LPCAMM2 list of the important voltages and signals to check LPDDR5 CAMM2 faults for modern laptops.

LPCAMM2 SAY Goodbye to the Laptop RAM circuit
and here the list of the important voltages and signals to check LPDDR5 CAMM2 faults for modern laptops.



In recent days, Lenovo has released the world's first laptop featuring LPDDR5 CAMM2 memory, a module developed by SAMSUNG. This new module is an improvement over DELL's CAMM and is expected to become widespread in the coming years for several reasons. One of the primary benefits is that it addresses the recurring failures seen in embedded RAM chips on laptop motherboards and the issues with Apple’s Unified Memory in their devices over the past few years. They had to solder RAM chips alongside processors to achieve the required speed, but this led to numerous failures. With limited spare parts, many laptops became died and unusable, and several models gained a poor reputation.

The new module offers multiple times the data transfer speed while consuming 60% less power compared to previous technologies. This means more efficient and faster performance, fewer battery charges, longer lifespan, and lower temperatures. The design also allows users to replace the module themselves, with the connector being easily replaceable, eliminating the issues associated with built-in RAM failures. Currently, the module is available in capacities ranging from 16GB to 128GB.

For specialists
The module has 644 pins, and the PCB consists of 10 to 16 layers, making its size approximately 8cm × 3cm. Another significant advantage is that there is no longer a RAM circuit on the laptop motherboard in models that support this module. The module takes 5V from the power system and converts it to several voltages, which I will list at the end of this post, along with important signals that will help us troubleshoot issues in future generations using schematics . This means repair will be easier. For example, the recently released model uses the PMIC5200 chip, which provides all the necessary voltages, whether PWM or LDO, for the module and the processor. The old SPD system couldn't be used because the module functions as more than just RAM in a single piece, so they relied on the SPD5118, an SPD HUB IC.

The recently released laptop model is the ThinkPad P1 Gen 7.

Fortunately, in recent days, the initial design for ALEXSOF LPCAMM2 ANALYZER TESTER . This tester will be installed in the module's connector to measure important signals and pins, and display POST CODES, which will aid us in troubleshooting faults. I plan to start testing as soon as the module becomes widely available in the market. Below is a list of the main voltages and some signal names related to the module that will be tracked without a tester using the laptop’s schematic.

- 1.1V, 0.5V, 1.05V
- VDD2L=0.9V
- VDD2H=1.05V
- VDDQ=0.5V
- VDD=1.1V
- HSCL=1.0V
- HSDA=1.0V
- HSA=2.1V
- VPP=1.8V
- DVFSQ#=1.8V
- PWR_EN=1.8V
- UNLOCK=1.8V
- DQS=VDDQ
- DQ0=VDDQ
- DMI=VDDQ
- WCKT,C=VDDQ
- RESET#=80-20% of VDDQ
- CLK_T=VDD
- CLK_C=VDD
- CLK-N=F-EDGE
- CLK-P=R-EDGE
- VIN_BULK=5V
- REG= 46, 4A, 4C
- TSD=1024 byte

i need schematic diagram for Xiaomi Mi Notebook Pro 15 6

i need schematic diagram for Xiaomi Mi Notebook Pro 15 6
for the one with RTX3050TI
(A30)

How to open a motherboard .cad file ?

I received a .cad file for my laptop but don't know how to open it.

Any suggestion ?

msi gf75 burnt smell on power up

Hi,

I do small repairs to my msi gf75, but recently one of the hinges was very hard to move and broke the surrounding plastic of the laptop covers.

Today I tried to glue that part and when I powered up the laptop I smelled something has burnt. Then the laptop stopped booting up at all.

What could be burnt ?

20240430_070813.jpg

20240430_070650.jpg

20240430_070703.jpg

20240430_070658.jpg

motherboard M4HM87P Rev 1.0 unknown ic

Hello,

I need help with a motherboard.
It is a mini PC, GIGABYTE GB-BXi7-4770R.
The motherboard M4HM87P Rev. 1.0
As you can see in the photo, the IC burned out.
I need the label/letters/numbers of the ic or the circuit diagram/schematic.
I am thankful for every help.

Best regards

20240426_181215.jpg 20240426_181242.jpg 20240426_181503.jpg 20240426_181521.jpg
Top