php editor Xiaoxin is here to introduce to you how to check the memory capacity of your laptop. For users who want to know how many GB of memory their laptop has, it is actually very simple. Just press the Win R key to open the run window, then type dxdiag and press Enter. In the pop-up window, select the system tab and you can see the displayed memory capacity information. This way, you can easily know how much memory your laptop has.
You can check the memory capacity of your laptop by viewing the system information. The specific steps are as follows: 1. Open the "Start" menu and click "Control Panel"; 2. Click "System and Security"; 3. Click "System"; 4. Under "System Type", you can see "Memory ( RAM)" capacity, in GB.
Different models of laptop motherboard batteries have different installation locations and removal methods.
The motherboard battery of a laptop computer is not necessarily the same as that of a desktop computer. Some laptop models have a button battery with a base. Even so, the specifications are not necessarily the same as those of a desktop computer.
The motherboard battery is used to record the time of the computer system, that is, to maintain the accuracy of the system clock. When the battery is insufficient, the time will return to the factory date, and to record the hardware information used during startup, that is, to maintain the accuracy of the system clock. CMOS BIOS information.
1. When the computer is turned on, the computer screen will display a blue screen;
What are the symptoms of a broken motherboard?
2. Also when the computer is turned on, it will freeze directly , unable to complete the boot self-test;
What are the symptoms of a broken motherboard
3. If the mouse, keyboard, sound card, and graphics card are integrated, there will be no corresponding sound or image;
What are the symptoms of a broken motherboard?
4. After turning on the computer, the self-test cannot be completed and the BIOS settings cannot be entered;
The specific slots on the computer motherboard and their uses are described below.
Floppy drive interface: used to connect floppy drives, mostly located next to the IDE interface, slightly shorter than the IDE interface, because it is 34 pins, so the data cable is also slightly narrower.
Hard disk interface, on older motherboards, there are also two IDE ports. Usually the IDE interface is located under the PCI slot, and the space is vertical to the memory slot (also horizontal). On new motherboards, most of the IDE interfaces have been reduced and have not even been replaced by SATA interfaces.
COM interface (serial port): Most motherboards provide two COM interfaces, COM1 and COM2, for connecting serial mice and external modems.
PS/2 interface: The PS/2 interface has only one function and can only be used to connect the keyboard and mouse. Usually, the mouse interface is green and the keyboard interface is purple. The transmission speed of the PS/2 interface is slightly faster than that of the COM interface, but after so many years of use, most motherboards still have this interface, but fewer and fewer mice and keyboards support the interface.
USB interface: USB interface is the most popular interface today. It can support up to 127 peripherals and can be independently powered. It is widely used. The USB interface can obtain 500mA current from the motherboard, supports hot swapping, and is truly plug-and-play.
LPT interface (parallel port): usually used to connect a printer or scanner. The default interrupt number is IRQ7, which uses a 25-pin DB-25 connector.
MIDI interface: The MIDI interface of the sound card and the joystick interface are shared. The two pins in the interface are used to transmit MIDI signals and can be connected to various MIDI devices, such as electronic keyboards. It is difficult to find products based on this interface.
SATA interface: The full name of SATA is Serial Advanced Technology Attachment, a serial-based hardware driver interface based on industry standards. It is a hard disk interface jointly proposed by Intel, IBM, Dell, APT, Maxtor and Seagate.
Judgment method:
1. After water enters, please cut off the power immediately and remove the battery.
2. Remove the incoming moisture and use food desiccant to leave it for about two hours;
3. Only plug in the power adapter and try to turn it on.
4. If the display is normal after powering on, it means the problem is not serious and it can be used normally.
5. If there is no display or alarm sound when turning on the computer, it means the components inside the notebook are damaged, such as memory, graphics card, etc.
6. If this problem occurs, it will usually be repaired for a fee. You can contact the dealer to handle it.
You can find the Mac mini motherboard model in the following ways:
1. Use the system information tool: Open the "Applications" folder on Mac mini and find the "Utilities" file folder to open the System Information tool. Select the "Hardware" option in the left navigation bar, and then view information such as "Motherboard Name" and "Motherboard Model" in the right window.
2. Check the official documentation: You can check the Mac mini's technical specifications document on Apple's official website, which contains detailed hardware configuration information, including motherboard model and other hardware parameters.
3. Disassemble the chassis and view: If you can disassemble the Mac mini chassis, you can directly view the model logo on the motherboard, which is usually located in the center of the motherboard or near the I/O interface. However, disassembling Mac mini requires high technical skills. If you are not familiar with the operation, it is recommended to ask professionals to perform repairs.
It should be noted that each model of Mac mini may use a different motherboard, so you need to confirm your model and configuration information when looking for the motherboard model
1. Stupid method
If the user is using a desktop computer or a detachable all-in-one computer, after turning on the computer, pay attention to the text logo on the motherboard, regardless of the style of the motherboard. There will be a string of character codes in the middle or side of the motherboard.
2. Model query
If the user is using an all-in-one computer or a laptop, there is no need to use stupid methods to query. You can directly search the computer parameters through a search engine to determine the motherboard model. , take ASUS Flying Fortress 6 FX86FE as an example.
3. Third-party query
If you don’t want to use the first two methods, you can also download a third-party software. Take "Master Lu" as an example. After opening the software, click "Hardware" "Detect", select "Motherboard Information" in the pop-up interface, and you can see the motherboard model.
How to find the common point of the notebook motherboard
On a complex motherboard, there are multiple modules or components that require different voltages. Only the voltage at the common terminal is the most stable, and most of the voltages are converted by the common terminal. came. So how do you find the common point? After the laptop adapter comes in with 19V, it usually has a fuse F component and two MOS. This is the common point with the highest voltage. There are also smaller ones, such as common nodes that provide power to both the graphics card and the CPU. For example, the resistance of the first common point to ground test point is basically between 400 and 600Ω. This resistance value can reflect whether the circuit of each unit is normal. Through the common point, you can quickly determine whether the main power supply on the motherboard is short-circuited. .
The common point-to-ground resistance is 0. In this case, the main power supply is severely short-circuited. Any component on the main power supply may cause a short circuit. The elimination method is: remove the filter capacitors connected to the main power supply one by one. By disassembling and eliminating,
you can judge based on experience which unit circuit is prone to problems and remove the connected capacitors. You can also start from the unit circuits with less capacitance on the unit circuit until the culprit of the short circuit is found. Just replace it.
The resistance between the common point and the ground is about tens to one hundred Ω. This situation is a micro short circuit. It may be caused by the breakdown of the field tube connected to a certain unit circuit and the main circuit. The troubleshooting method is: A unit circuit connected to the mains supply.
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