Questions tagged [motherboard]

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61 views

How to solder speaker wires back to pcb (Switch)

I have a Nintendo switch lite with the connector for the speaker broken off. I am looking for the best way to fix this. Is it possible to solder directly to the motherboard? I am just looking to ...
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1answer
52 views

How do I connect this crane machine motherboard to my power supply? What connectors do I need for the power supply header pins?

I bought a DIY crane machine online and I'm trying to work out how to set up the power supply. The power supply they provided in the photos looks setup like this, where elements are screwed into the ...
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1answer
48 views

Component ID: SMD resistor(?)

tl;dr: how to procure a SMD replacement if all i know is the 3R3 marking and sizes (square 6.5mm sides, 2.9mm tall), with no extra information on thermal, etc. One component on my motherboard fried to ...
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1answer
83 views

Need help identifying IC from Intel Mini PC PCB - top marking “1930 3614564”

I was looking into a blown up Intel Mini PC PCB (PIPO x8) and saw that a capacitor and a nearby IC were blown. I have no clue what the IC is or was for. Luckily I had a photo before it blew so I know ...
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0answers
51 views

Can stripped hole in a motherboard be repaired?

I was doing an SSD upgrade and the fan is held to the motherboard by screws. When I went to re-install the fan, the hole/nut in the motherboard seems to be stripped. Can this be repaired? What do ...
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1answer
22 views

Motherboard panel header current

I'm looking to build a little pcb that boots my main PC over wifi with a ESP32. Because yes, no wake on lan or other fancy methods available. Looking through motherboard specs, I couldn't find a ...
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2answers
95 views

How can I create one PCB that I can plug-in to two different places in a mother PCB?

I believe there are many answers to this question, but I would like to have one that works best in KiCad allowing me to run the rule check for all the involved schematics. What have I tried: On top of ...
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1answer
26 views

Connecting different Sensors / Actuators

I have a fairly general problem in understanding, I guess, "bus systems": Take the following scenario: We aim to create a motherboard-type of board, it shall use some kind of CPU that is able (...
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1answer
35 views

How would you connect a LVDS display to a laptop motherboard supporting natively a different display?

I'm planning a project of building a 4:3 laptop based on existing (modern) components. As 4:3 displays are not manufactured anymore the idea is to take one from a old laptop, like a thinkpad T60. Then ...
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2answers
62 views

How can I discharge static electricity from my body?

I am planning to install a PCI Express Wifi-adapter in my PC. In order to do this, I would need to open my PC. I'm worried that if there is static electricity in my hands it could fry the motherboard. ...
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1answer
61 views

Voltage Regulator giving wrong output [closed]

I'm attempting to fix my desktop motherboard which is damaged by power surge, and I noticed that the +3.3VSB is giving 1.6 volts. There are few voltage regulators around the board, I checked them ...
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52 views

Motherboard with 4 pin and fan with 3 pin

This is my first question and I'm a little tired to do more and more research. So I decided to ask and please let me go straight to the point: The fan connector of my motherboard has 4 pin and the ...
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2answers
210 views

What is the role of discrete resistors and capacitors in a motherboard? [closed]

I know the basic function of resistors and capacitors. I know filters, oscillators, one-shot, differentiator/integrator, ADC/DAC, power supplies, etc. But in a motherboard why are there so many ...
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2answers
115 views

How to clean DUST stucked due to moisture on pins of chips ICs of motherboard circuits

Which chemical can I clean my old motherboard with, whose electronics components chips pins like ICs capacitor transistors diodes have dust stocked their color has been changed to black yellowish ...
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1answer
704 views

Can Computer Motherboards Work Fine Even With A Damaged SMD Capacitor/Resistor?

I'm asking this because when I was replacing my laptop battery, I accidentally hit and broke/disconected one SMD capacitor off the board, then I turned my laptop on, it made some weird electrical ...
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1answer
65 views

Resistor causing problems when in series with LED

I am wanting to dim the light on my computers power light, its just a 5mm LED what i am guessing gets 5v from the motherboard to power it The problem I am having is that when adding a 100R resistor ...
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3answers
137 views

Can I somehow control a PSU-powered fan using a 4-pin fan output on the motherboard? [duplicate]

I have a 12V 29.4W 3-wire Delta Electronics fan that I want to power using an EVGA 750 G3 PSU and control via one of the 4-pin fan terminals on an MSI MSI Z390-A PRO ATX LGA1151 motherboard. Not ...
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1answer
92 views

Beginner questions on some SMD components in phone motherboard

I'm trying to understand smartphone motherboard components and have a few questions that might be easy for some of you to answer. Please refer to the attached image for the question numbers: Are ...
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2answers
1k views

mATX motherboard JFP1 header: Does not require pull-up or pull-down resistors, right?

As per some of the mATX motherboard specifications, the JFP1 (Front-Panel connector #1 jumper), the purpose of the various pins is as per this graphic: As per the description of the pins, I get the ...
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3answers
188 views

Identify components on computer motherboard - cylindrical and cube shapes

I'd like to know what components are the ones with blue numbers and the big ones behind them: The latter components I'm talking about:
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2answers
211 views

How to identify a PCB connector type?

Is it possible for someone to identify these backplane (motherboard) connectors, the ones in brown color? The daughter cards which plug-into these connectors are 3U size cards. This is an outdated ...
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1answer
38 views

Where does a wire labeled “3G” must be connected in turbo x notebook? [closed]

I got angry and punched my Turbo x notebook and it shutted down. When I opened it again I got the famous error 0xc00000e9. So I thought that possibly a cable is disconnected or the hard drive is ...
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2answers
418 views

Using 5V motherboard pin

I want to create an electrical circuit that powers up the computer when a sensor is activated. This sensor is in parallel with the power switch button. As far as I understood from reading on ...
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3answers
102 views

ESD mats & motherboard safety

Let’s assume bog standard two layer ESD mat with static dissipative top and conductive bottom layer, with resistance to ground somewhere between one mega-ohm to one giga-ohm and with both a mat and ...
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0answers
80 views

What do these capacitor markings mean?

Aluminum Organic Polymer Capacitor So to be really honest, I did blow an capacitor a while back by applying the wrong voltage to it, and had ever since then trying to decode this info to track down an ...
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1answer
2k views

Connecting 21" screen to LVDS connector on motherboard

I'm working in an "All-in-One pc" project. For that, I have an old Dell laptop (which only works with DC adapter) and a 21" LG monitor. My question is: How can I connect the LCD panel directly on the ...
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1answer
1k views

Testing 8 pin P-Channel MOSFETS on Laptop Motherboard

My laptop died recently and I’m testing the motherboard. I’m led to believe these two MOFSETs on the board may be part of the issue PQ301 and PQ302. Using a multimeter continuity and diode mode; ...
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1answer
42 views

USB internal control to on/off a pc fan molex circuit

I am new to electronic circuits so I might not have the correct nomenclature for some items. Description: I have 3 high power 12V PC fans (NON PWM) connected to a hub that draw power from MOLEX ...
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2answers
158 views

Linux (OS) on Custom Hardware (Custom Motherboard) [closed]

We are designing and producing our custom high-speed boards consisting of FPGA and gigabit ethernet signals. Hence, we are not professional for high-speed motherboard design but know some issues like ...
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1answer
816 views

Source of 5v power on a typical motherboard

Forgive me for asking an interdisciplinary question. I need to get more 5v power out of a desktop power supply to power a bunch of peripherals. These supplies can go as high as 1600w but the power ...
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1answer
2k views

How to Hardware Write Protect Flash SPI, Setting WP# pin signal low stage [Asus P5Q Pro + MX25L8005 SPI]

As a pen testing & security experiment and feature I want to enable write protect on my SPI Flash MX25L8005 module on my motherboard to protect the SMM modules, AML, ACPI and other areas of the ...
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3answers
1k views

Soaking phone motherboard in isopropyl to fix potential corrosion

Is it advisable/safe to soak my phone motherboard in an isopropyl alcohol bath? I dismantled it after water damage occurred and it now powers on fine but my cell signal isn't consistent. I was ...
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2answers
404 views

Looking for a motherboard CPU Power MOSFET replacement - is this OK to put not exact the same?

I have a motherboard with broken PDC3094X (Potens Semiconductor) in VRM circuit. I cannot find the replacement with exact same parameters and the original part is impossible to get. I don't have a lot ...
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1answer
660 views

How to determine IBM USB 6 pin header pinout?

I have two IBM Power 7 machines - Power720 and Power740 (8202-E4B and 8205-E6B) and both have an internal USB 6 pin header (labelled J3_TAPEUSB_SIGNAL). These are for connection to a single device (...
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1answer
306 views

What is the difference between a BIOS chip and a PCH

From what I can gather, the BIOS chip is a loadable memory space that handles initial I/O, system checks and CAN configure certain things like power states and clock rates, before handing operation ...
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2answers
261 views

How do we name the “spring-mounted spikes” component on MacBook Pro motherboards?

How to we name these components that we see on the motherboards of the MacBook Pro (either silvered or gold) when the bottom cover lid is removed, and that seem mounted on springs? Ancillary, does ...
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2answers
489 views

I want to attach a heat sink to the inductors on my motherboard, which glue could I use? [closed]

If I wanted to attach a heat sink to the inductors on my motherboard, which glue could I use? I have a Gigabyte A320M-S2H, this motherboard has heating problem when used with the AMD ZRyzen 7 2700X ...
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3answers
82 views

Connecting a single LED to Motherboard CHA Fan Header

I've been reading that it is possible to connect a LED to the motherboards CHA fan controller. The LED I had in mind was this Online people have been saying you would need a resistor as the voltage ...
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1answer
321 views

Mainboards ATX “PWR_OK” signal fried [closed]

I've been struggling here trying to find out what exactly went wrong, but I just can't. I messed around with a power supply and decided to wire up my own with 3.3V, 5V, 12V and all other connections ...
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1answer
62 views

How does integrated displays controlled by the computer?

Consider a run off the mill pc: lcd displays connected, you have brightness control in the menu of the lcd. And some other stuff like color temp and modes. Now consider a laptop, AIOs and kiosk PCs. ...
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2answers
550 views

How do we find the bandwidth of a bus?

The data width and cycle rate are used to determine the bandwidth, or the total amount of data that the bus can transmit. An 8-bit bus (1-byte data width) that operates at a cycle rate of 1,000 MHz (1,...
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2answers
112 views

DIP (dual inline package) [closed]

searching on the net, but couldnt understand for what is used DIP? Is it RAM? Will be glad for your answers.
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1answer
131 views

Motherboard's 4 pin DC input polarity

I have a motherboard, that requires a DC input. The manual has this: I'm trying to find a power brick, but all bricks I can find usually have +12V/-12V on pins or shell and no ground. Can I use them?...
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3answers
770 views

Signal and voltage

What is the difference between voltage and signal? In power sequence of motherboards, there are signals and supplies. Supplies are voltages but how is a signal generated?? Is signal related to both ...
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0answers
145 views

Can a PC motherboard be used as an uber microcontroller?

I'm aware of the differences between a common microcontroller and a full blown motherboard from a computer server. But consider what happens when the PC memory testing tool memtest86 is run:- Here ...
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1answer
184 views

transistor replacement dp35dp

Hello I have an old Intel Motherboard DP35DP, I was using this board as a file server using RAID (Its crucial to get that RAID array working again). It seems like the culprit is a transistor, its ...
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1answer
356 views

Strange footprint labeled PJ## on laptop's motherboard

Today I came across a picture of a laptop motherboar (below). I noticed three strange looking small footprints, labelled PJ12, PJ36 and PJ37. The J may stand for jumper, and on the top left corner ...
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1answer
613 views

How can I repair a ceramic capacitor? [closed]

This is an all-in-one Dell Inspiron One 2305. I received it for free because it was "having issues with the RAM." However, the power light was a solid amber when plugged in, and I was unable to ...
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2answers
428 views

Can i replace 3 (parallel) capacitors 16v 1800uf with 16v 2200uf?

The motherboard model is G31T-M REV:1.0 . The circuit is for the 4-pin 12v power rail coming from the power supply. I'm replacing these because they are very bloated, It's quite a miracle that the ...
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3answers
1k views

What edge connector for prototype board?

For personal hobby projects I'm using prototype boards like this (2.54 mm pitch): I connect them using wires, which is a mess. I want to use a backplane with female edge connectors, for a solution ...